updated for version 7.3.1250

Problem:    Python tests fail on MS-Windows.
Solution:   Change backslashes to slashes. (Taro Muraoka)

src/version.c

@@ -728,6 +728,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1250,
 /**/
     1249,
 /**/