patch 8.2.4992: compiler warning for possibly uninitialized variable

Problem:    Compiler warning for possibly uninitialized variable. (Tony
            Mechelynck)
Solution:   Initialize variable in the caller instead of in the function.

src/version.c

@@ -746,6 +746,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    4992,
 /**/
     4991,
 /**/