patch 8.2.3904: Vim9: skip expression type is not checked at compile time

Problem:    Vim9: skip expression type is not checked at compile time.
Solution:   Add argument type checks.

src/version.c

@@ -749,6 +749,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    3904,
 /**/
     3903,
 /**/