add error check

diff --git a/ext/gd/libgd/gd_webp.c b/ext/gd/libgd/gd_webp.c
index eef65f79fb838ae0d754565862562cce57d05505..e85e9d9ffac3d9b79de2052d1cafa1caeaea65ef 100644 (file)
--- a/ext/gd/libgd/gd_webp.c
+++ b/ext/gd/libgd/gd_webp.c
@@ -14,6 +14,8 @@ gdImagePtr gdImageCreateFromWebp (FILE * inFile)
 {
        gdImagePtr im;
        gdIOCtx *in = gdNewFileCtx(inFile);
+       if (!in)
+               return 0;
        im = gdImageCreateFromWebpCtx(in);
        in->gd_free(in);