Security improvements to TEXT coder broke it
diff --git a/coders/mvg.c b/coders/mvg.c
index 7b09d08..3062463 100644
--- a/coders/mvg.c
+++ b/coders/mvg.c
@@ -212,6 +212,8 @@
           draw_info->primitive[GetBlobSize(image)]='\0';
         }
      }
+  if (draw_info->primitive == (char *) NULL)
+    ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
   (void) DrawImage(image,draw_info,exception);
   draw_info=DestroyDrawInfo(draw_info);
   (void) CloseBlob(image);