updated for version 7.3.645

Problem:    No tests for patch 7.3.625 and 7.3.637.
Solution:   Add more tests for the "gn" command and try/catch. (Christian
            Brabandt)

src/version.c

@@ -719,6 +719,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    645,
 /**/
     644,
 /**/