Port qgifer to giflib 5 API.
See also: https://bugs.gentoo.org/show_bug.cgi?id=536634

--- a/src/gifcreator.cpp
+++ b/src/gifcreator.cpp
@@ -38,7 +38,7 @@
 		    j--;
 	       }
      for(int i=0;i<cmaps.size();i++)
-	  FreeMapObject(cmaps[i]);
+	  GifFreeMapObject(cmaps[i]);
 }
 
 
@@ -52,7 +52,7 @@
      }
   
   
-     GifFileType *GifFile = EGifOpenFileName(filename, FALSE);
+     GifFileType *GifFile = EGifOpenFileName(filename, 0, NULL);
   
      if (!GifFile){
 	  PrintGifError();
@@ -74,7 +74,7 @@
      {
 	  char nsle[12] = "NETSCAPE2.0";
 	  char subblock[3];
-	  if (EGifPutExtensionFirst(GifFile, APPLICATION_EXT_FUNC_CODE, 11, nsle) == GIF_ERROR) {
+	  if (EGifPutExtension(GifFile, APPLICATION_EXT_FUNC_CODE, 11, nsle) == GIF_ERROR) {
 	       PrintGifError();
 	       return false;
 	  }
@@ -82,7 +82,7 @@
 	  subblock[2] = loop_count % 256;
 	  subblock[1] = loop_count / 256;
 
-	  if (EGifPutExtensionLast(GifFile, APPLICATION_EXT_FUNC_CODE, 3, subblock) == GIF_ERROR) {
+	  if (EGifPutExtension(GifFile, APPLICATION_EXT_FUNC_CODE, 3, subblock) == GIF_ERROR) {
 	       PrintGifError();
 	       return false;
 	  }
@@ -111,7 +111,7 @@
             
 	  if (EGifPutImageDesc(
 		   GifFile,
-		   0, 0, w, h, FALSE, cmaps.size() > ni ? cmaps.at(ni) : cmaps.at(cmaps.size()-1)
+		   0, 0, w, h, 0, cmaps.size() > ni ? cmaps.at(ni) : cmaps.at(cmaps.size()-1)
 		   ) == GIF_ERROR) {
 	       PrintGifError();
 	       endProgress();
@@ -135,7 +135,7 @@
 	  return false;
      }
    
-     if (EGifCloseFile(GifFile) == GIF_ERROR) {
+     if (EGifCloseFile(GifFile, NULL) == GIF_ERROR) {
 	  PrintGifError();
 	  endProgress();
 	  return false;
--- a/src/gifcreator.h
+++ b/src/gifcreator.h
@@ -31,6 +31,12 @@
 typedef vector<GifByteType> Frame;
 typedef unsigned char Byte;
 
+static inline void
+PrintGifError()
+{
+	fprintf(stderr, "\nGIF-LIB error: %s.\n", GifErrorString(GIF_ERROR));
+}
+
 class GifCreator
 {
 
--- a/src/palettewidget.cpp
+++ b/src/palettewidget.cpp
@@ -34,7 +34,7 @@
 
 PaletteWidget::~PaletteWidget()
 {
-     FreeMapObject(palette);
+     GifFreeMapObject(palette);
 }
 
 void PaletteWidget::paintEvent(QPaintEvent*)
@@ -117,7 +117,7 @@
      if(palette && mindiff > 1)
      {
 	  qDebug() << "deleting old palette, size: " << size << ", colors: " << palette->ColorCount;
-	  FreeMapObject(palette);
+	  GifFreeMapObject(palette);
 	  qDebug() << "done";
 	  palette = NULL;
      }
@@ -157,7 +157,7 @@
      }
 
      ColorMapObject* previous = palette;
-     palette = MakeMapObject(size, NULL);
+     palette = GifMakeMapObject(size, NULL);
      if (!palette) 
      {
 	  qDebug() << "NULL palette!";
@@ -165,7 +165,7 @@
      }
      
 
-     if (QuantizeBuffer(fimg.width(), fimg.height(), &size, 
+     if (GifQuantizeBuffer(fimg.width(), fimg.height(), &size, 
      			&(r[0]),&(g[0]),&(b[0]), &(output[0]), 
      			palette->Colors) == GIF_ERROR) 
      {
@@ -178,11 +178,11 @@
      //qDebug() << "difference: " << df;
      if(previous && df < mindiff)
      {
-	  FreeMapObject(palette);
+	  GifFreeMapObject(palette);
 	  palette = previous;
      }
      else if(df >= mindiff)
-	  FreeMapObject(previous);
+	  GifFreeMapObject(previous);
 
      // qDebug() << "palette (" << palette->ColorCount << ") :";
      // for(int i=0;i<size;i++)
@@ -230,8 +230,8 @@
 {
      QStringList rgb = QString(str).split(";", QString::SkipEmptyParts);
      if(palette)
-	  FreeMapObject(palette);
-     palette = MakeMapObject(rgb.size(), NULL);
+	  GifFreeMapObject(palette);
+     palette = GifMakeMapObject(rgb.size(), NULL);
      if(!palette)
 	  return false;
      size = rgb.size();
--- a/src/palettewidget.h
+++ b/src/palettewidget.h
@@ -30,7 +30,7 @@
      PaletteWidget(QWidget* parent=0, Qt::WindowFlags f=0);
      virtual ~PaletteWidget();
      ColorMapObject* map() {return palette;}
-     ColorMapObject* mapCopy() {return MakeMapObject(palette->ColorCount, palette->Colors);}
+     ColorMapObject* mapCopy() {return GifMakeMapObject(palette->ColorCount, palette->Colors);}
      bool fromImage(const QImage& img, int palette_size, float mindiff = 2);
      void setColumnCount(int cc){cols = cc;}
      bool toFile(const QString& path);
@@ -38,7 +38,7 @@
      QString toString();
      bool fromString(const QString& str);
      int getSize() const {return size;}
-     void clear() {if(palette) FreeMapObject(palette); palette = NULL; update();}
+     void clear() {if(palette) GifFreeMapObject(palette); palette = NULL; update();}
 private:
      int size;
      int cols;