[gtk+] Avoid integer overflow

[Matthias Clasen <matthiasc src gnome org>]

commit 894b1ae76a32720f4bb3d39cf460402e3ce331d6
Author: Matthias Clasen <mclasen redhat com>
Date:   Sat Jun 29 22:06:54 2013 -0400

    Avoid integer overflow
    
    Use g_malloc_n in gdk_cairo_set_source_pixbuf when allocating
    a large block of memory, to avoid integer overflow.
    
    Pointed out by Bert Massop in
    https://bugzilla.gnome.org/show_bug.cgi?id=703220

 gdk/gdkcairo.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/gdk/gdkcairo.c b/gdk/gdkcairo.c
index 19bed04..2e1d8dc 100644
--- a/gdk/gdkcairo.c
+++ b/gdk/gdkcairo.c
@@ -213,7 +213,7 @@ gdk_cairo_set_source_pixbuf (cairo_t         *cr,
     format = CAIRO_FORMAT_ARGB32;
 
   cairo_stride = cairo_format_stride_for_width (format, width);
-  cairo_pixels = g_malloc (height * cairo_stride);
+  cairo_pixels = g_malloc_n (height, cairo_stride);
   surface = cairo_image_surface_create_for_data ((unsigned char *)cairo_pixels,
                                                  format,
                                                  width, height, cairo_stride);