patch 7.4.1785

Problem:    Regexp test fails on windows.
Solution:   set 'isprint' to the right value for testing.

src/version.c

@@ -753,6 +753,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1785,
 /**/
     1784,
 /**/