sys/ximage/gstximagesrc.c: Fix hypothetical crash.

Original commit message from CVS:
2006-06-29  Zaheer Abbas Merali  <zaheerabbas at merali dot org>

* sys/ximage/gstximagesrc.c: (gst_ximage_src_ximage_get):

Fix hypothetical crash.

ChangeLog

+2006-06-29  Zaheer Abbas Merali  <zaheerabbas at merali dot org>
+
+	* sys/ximage/gstximagesrc.c: (gst_ximage_src_ximage_get):
+	
+	Fix hypothetical crash.
+
 2006-06-28  Tim-Philipp Müller  <tim at centricular dot net>
 
 	Patch by: Brian Cameron  <brian dot cameron at sun dot com>

sys/ximage/gstximagesrc.c

@@ -479,7 +479,11 @@ gst_ximage_src_ximage_get (GstXImageSrc * ximagesrc)
       int cx, cy, i, j, count;
 
       cx = ximagesrc->cursor_image->x - ximagesrc->cursor_image->xhot;
+      if (cx < 0)
+        cx = 0;
       cy = ximagesrc->cursor_image->y - ximagesrc->cursor_image->yhot;
+      if (cy < 0)
+        cy = 0;
       count = ximagesrc->cursor_image->width * ximagesrc->cursor_image->height;
       for (i = 0; i < count; i++)
         ximagesrc->cursor_image->pixels[i] =