Don't set image_info->magick if its already defined.

diff --git a/MagickCore/image.c b/MagickCore/image.c
index 35dcb9463e43671ee4a2098319a6899396b81af2..ddfe42159ddcd664cd0794a5f7cbb7245c4f7d81 100644 (file)
--- a/MagickCore/image.c
+++ b/MagickCore/image.c
@@ -2431,7 +2431,8 @@ MagickExport MagickBooleanType SetImageInfo(ImageInfo *image_info,
         }
     }
   *extension='\0';
-  GetPathComponent(image_info->filename,ExtensionPath,extension);
+  if (*image_info->magick != '\0')
+    GetPathComponent(image_info->filename,ExtensionPath,extension);
 #if defined(MAGICKCORE_ZLIB_DELEGATE)
   if (*extension != '\0')
     if ((LocaleCompare(extension,"gz") == 0) ||