patch 8.2.4925: trailing backslash may cause reading past end of line

Problem:    Trailing backslash may cause reading past end of line.
Solution:   Check for NUL after backslash.

src/version.c

@@ -746,6 +746,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    4925,
 /**/
     4924,
 /**/