Eliminate possible but rare memory leak (bug report by Dirk)

diff --git a/coders/pgx.c b/coders/pgx.c
index e03981f879c6650d5bb8738b6e68186b4a599411..04a5f2c99624b1635da3ce0fdbcc6db6ae5e8deb 100644 (file)
--- a/coders/pgx.c
+++ b/coders/pgx.c
@@ -376,7 +376,7 @@ static MagickBooleanType WritePGXImage(const ImageInfo *image_info,Image *image,
       GrayQuantum,pixels,exception);
     count=WriteBlob(image,length,pixels);
     if (count != (ssize_t) length)
-      ThrowWriterException(CorruptImageError,"UnableToWriteImageData");
+      break;
     count=WriteBlob(image,(size_t) (-(ssize_t) length) & 0x01,pixels);
     status=SetImageProgress(image,SaveImageTag,(MagickOffsetType) y,
       image->rows);
@@ -384,6 +384,8 @@ static MagickBooleanType WritePGXImage(const ImageInfo *image_info,Image *image,
       break;
   }
   quantum_info=DestroyQuantumInfo(quantum_info);
+  if (y < (ssize_t) image->rows)
+    ThrowWriterException(CorruptImageError,"UnableToWriteImageData");
   (void) CloseBlob(image);
   return(status);
 }