gd/gd-png_check_sig.patch

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--- gd_png.c
+++ gd_png.c
@@ -151,7 +151,7 @@
return NULL;
}
- if (!png_check_sig (sig, 8)) { /* bad signature */
+ if (png_sig_cmp (sig, 0, 8)) { /* bad signature */
return NULL; /* bad signature */
}