patch 8.1.1054: not checking return value of ga_grow()

Problem:    Not checking return value of ga_grow(). (Coverity)
Solution:   Only append when ga_grow() returns OK.

src/version.c

@@ -775,6 +775,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1054,
 /**/
     1053,
 /**/