Use g_clear_error instead of g_error_free

* src/image.c: Define g_clear_error instead of g_error_free.
(init_svg_functions): Resolve symbol g_clear_error instead of
g_error_free.
(svg_load_image): Use g_clear_error instead of g_error_free, to
suppress GLib warnings when ERR is not set.  See bug#21641.

diff --git a/src/image.c b/src/image.c
index 4d1d2014258b6054852eebefcb39aa63a8a5eec4..c702782b64ba412aa61925f1045efe3b247385df 100644 (file)
--- a/src/image.c
+++ b/src/image.c
@@ -8991,7 +8991,7 @@ DEF_DLL_FN (int, gdk_pixbuf_get_bits_per_sample, (const GdkPixbuf *));
 DEF_DLL_FN (void, g_type_init, (void));
 #  endif
 DEF_DLL_FN (void, g_object_unref, (gpointer));
-DEF_DLL_FN (void, g_error_free, (GError *));
+DEF_DLL_FN (void, g_clear_error, (GError **));
 
 static bool
 init_svg_functions (void)
@@ -9029,7 +9029,7 @@ init_svg_functions (void)
   LOAD_DLL_FN (gobject, g_type_init);
 #  endif
   LOAD_DLL_FN (gobject, g_object_unref);
-  LOAD_DLL_FN (glib, g_error_free);
+  LOAD_DLL_FN (glib, g_clear_error);
 
   return 1;
 }
@@ -9045,7 +9045,7 @@ init_svg_functions (void)
 #  undef gdk_pixbuf_get_pixels
 #  undef gdk_pixbuf_get_rowstride
 #  undef gdk_pixbuf_get_width
-#  undef g_error_free
+#  undef g_clear_error
 #  undef g_object_unref
 #  undef g_type_init
 #  undef rsvg_handle_close
@@ -9063,7 +9063,7 @@ init_svg_functions (void)
 #  define gdk_pixbuf_get_pixels fn_gdk_pixbuf_get_pixels
 #  define gdk_pixbuf_get_rowstride fn_gdk_pixbuf_get_rowstride
 #  define gdk_pixbuf_get_width fn_gdk_pixbuf_get_width
-#  define g_error_free fn_g_error_free
+#  define g_clear_error fn_g_clear_error
 #  define g_object_unref fn_g_object_unref
 #  define g_type_init fn_g_type_init
 #  define rsvg_handle_close fn_rsvg_handle_close
@@ -9318,7 +9318,7 @@ svg_load_image (struct frame *f,         /* Pointer to emacs frame structure.  *
   /* FIXME: Use error->message so the user knows what is the actual
      problem with the image.  */
   image_error ("Error parsing SVG image `%s'", img->spec);
-  g_error_free (err);
+  g_clear_error (&err);
   return 0;
 }