Call malloc_trim after loading images

Not sure this is the best place to do it, but at least it is one
place where we tend to do large, temporary allocations.

gdk/loaders/gdkjpeg.c

@@ -30,6 +30,7 @@
 #include <jpeglib.h>
 #include <jerror.h>
 #include <setjmp.h>
+#include <malloc.h>
 
 /* {{{ Error handling */
 
@@ -237,8 +238,10 @@ gdk_load_jpeg (GBytes  *input_bytes,
 
   g_bytes_unref (bytes);
 
+  malloc_trim (0);
+
   gdk_profiler_end_mark (before, "Load jpeg", NULL);
- 
+
   return texture;
 }
 

gdk/loaders/gdkpng.c

@@ -27,6 +27,7 @@
 #include "gsk/gl/fp16private.h"
 #include <png.h>
 #include <stdio.h>
+#include <malloc.h>
 
 /* The main difference between the png load/save code here and
  * gdk-pixbuf is that we can support loading 16-bit data in the
@@ -300,6 +301,8 @@ gdk_load_png (GBytes  *bytes,
   g_free (row_pointers);
   png_destroy_read_struct (&png, &info, NULL);
 
+  malloc_trim (0);
+
   if (GDK_PROFILER_IS_RUNNING)
     {
       gint64 end = GDK_PROFILER_CURRENT_TIME;

gdk/loaders/gdktiff.c

@@ -26,6 +26,7 @@
 #include "gdktexturedownloaderprivate.h"
 
 #include <tiffio.h>
+#include <malloc.h>
 
 /* Our main interest in tiff as an image format is that it is
  * flexible enough to save all our texture formats without
@@ -500,6 +501,8 @@ gdk_load_tiff (GBytes  *input_bytes,
 
   TIFFClose (tif);
 
+  malloc_trim (0);
+
   if (GDK_PROFILER_IS_RUNNING)
     {
       gint64 end = GDK_PROFILER_CURRENT_TIME;