patch 7.4.1408

Problem:    MS-Windows doesn't have isnan() and isinf().
Solution:   Use _isnan() and _isinf().

src/version.c

@@ -748,6 +748,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1408,
 /**/
     1407,
 /**/