patch 7.4.837

Problem:    Compiler warning with MSVC compiler when using +sniff.
Solution:   Use Sleep() instead of _sleep(). (Tux)

src/version.c

@@ -741,6 +741,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    837,
 /**/
     836,
 /**/