patch 8.2.0337: build fails on a few systems

Problem:    Build fails on a few systems.
Solution:   Use vim_snprintf() instead of snprintf().

src/cmdexpand.c

@@ -2124,7 +2124,7 @@ ExpandFromContext(
 	int len = (int)STRLEN(pat) + 20;
 
 	tofree = alloc(len);
-	snprintf((char *)tofree, len, "^<SNR>\\d\\+_%s", pat + 3);
+	vim_snprintf((char *)tofree, len, "^<SNR>\\d\\+_%s", pat + 3);
 	pat = tofree;
     }
 

src/version.c

@@ -738,6 +738,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    337,
 /**/
     336,
 /**/