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.
diff --git a/src/version.c b/src/version.c
index bde9fe8..7cd8189 100644
--- a/src/version.c
+++ b/src/version.c
@@ -747,6 +747,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    4992,
+/**/
     4991,
 /**/
     4990,