patch 7.4.1940

Problem:    "gd" hangs in some situations. (Eric Biggers)
Solution:   Remove the SEARCH_START flag when looping.  Add a test.

src/version.c

@@ -753,6 +753,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1940,
 /**/
     1939,
 /**/