(modify_overlay): Update overlay_modiff of proper buffer.

diff --git a/src/buffer.c b/src/buffer.c
index 47b4f15..301098b 100644 (file)
--- a/src/buffer.c
+++ b/src/buffer.c
@@ -2798,7 +2798,7 @@ modify_overlay (buf, start, end)
        }
     }
 
-  ++OVERLAY_MODIFF;
+  ++BUF_OVERLAY_MODIFF (buf);
 }
 
 \f\f