Add missing ReleaseDC in EDIT_BuildLineDefs_ML.

diff --git a/controls/edit.c b/controls/edit.c
index 38d438d..fee3ce6 100644
--- a/controls/edit.c
+++ b/controls/edit.c
@@ -1033,6 +1033,7 @@
 	if (!current_line) /* Error occurred start is not inside previous buffer */
 	{
 		FIXME(" modification occurred outside buffer\n");
+		ReleaseDC(es->hwndSelf, dc);
 		return;
 	}