Fix uninitialised values in most codec image writers.

git-svn-id: file:///srv/caca.zoy.org/var/lib/svn/libpipi/trunk@2841 92316355-f0b4-4df1-b90c-862c8a59935f

pipi/codec/imlib.c

@@ -86,6 +86,7 @@ int pipi_save_imlib2(pipi_image_t *img, const char *name)
 
         img->codec_priv = (void *)priv;
         img->codec_format = PIPI_PIXELS_RGBA_C;
+        img->codec_free = pipi_free_imlib2;
 
         img->wrap = 0;
         img->u8 = 1;

pipi/codec/opencv.c

@@ -86,6 +86,7 @@ int pipi_save_opencv(pipi_image_t *img, const char *name)
 
         img->codec_priv = (void *)priv;
         img->codec_format = PIPI_PIXELS_BGR_C;
+        img->codec_free = pipi_free_opencv;
 
         img->wrap = 0;
         img->u8 = 1;

pipi/codec/sdl.c

@@ -90,6 +90,7 @@ int pipi_save_sdl(pipi_image_t *img, const char *name)
 
         img->codec_priv = (void *)priv;
         img->codec_format = PIPI_PIXELS_RGBA_C;
+        img->codec_free = pipi_free_sdl;
 
         img->wrap = 0;
         img->u8 = 1;