patch 8.2.1087: possible memory leak when file expansion fails

Problem:    Possible memory leak when file expansion fails.
Solution:   Clear the grow array when returning FAIL.  Use an error message
            instead of an empty string.
diff --git a/src/version.c b/src/version.c
index 6f6e481..f38c978b 100644
--- a/src/version.c
+++ b/src/version.c
@@ -755,6 +755,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1087,
+/**/
     1086,
 /**/
     1085,