patch 7.4.1730

Problem:    It is not easy to get a character out of a string.
Solution:   Add strgetchar() and strcharpart().

src/version.c

@@ -748,6 +748,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1730,
 /**/
     1729,
 /**/