patch 9.0.1231: completion of :runtime does not handle {where} argument

Problem:    Completion of :runtime does not handle {where} argument.
Solution:   Parse the {where} argument. (closes #11863)
diff --git a/src/findfile.c b/src/findfile.c
index ea07a89..4e2ad77 100644
--- a/src/findfile.c
+++ b/src/findfile.c
@@ -2533,7 +2533,7 @@
 	glob_flags |= WILD_ICASE;
     if (flags & EW_ADDSLASH)
 	glob_flags |= WILD_ADD_SLASH;
-    globpath(paths, pattern, gap, glob_flags);
+    globpath(paths, pattern, gap, glob_flags, FALSE);
     vim_free(paths);
 
     return gap->ga_len;