patch 9.1.1302: Coverity warns about using uninitialized value

Problem:  Coverity warns about using uninitialized value
          (Coverity, Tony Mechelynck, after v9.1.1301)
Solution: initialize callback pointer to NULL

Signed-off-by: Christian Brabandt <cb@256bit.org>

src/version.c

@@ -704,6 +704,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1302,
 /**/
     1301,
 /**/