patch 9.0.1238: :runtime completion can be further improved

Problem:    :runtime completion can be further improved.
Solution:   Also complete the {where} argument values and adjust the
            completion for that. (closes #11874)
diff --git a/src/proto/scriptfile.pro b/src/proto/scriptfile.pro
index df89a6a..24e5389 100644
--- a/src/proto/scriptfile.pro
+++ b/src/proto/scriptfile.pro
@@ -7,7 +7,6 @@
 char_u *estack_sfile(estack_arg_T which);
 void ex_runtime(exarg_T *eap);
 void set_context_in_runtime_cmd(expand_T *xp, char_u *arg);
-int expand_runtime_cmd(char_u *pat, int *numMatches, char_u ***matches);
 int find_script_by_name(char_u *name);
 int get_new_scriptitem_for_fname(int *error, char_u *fname);
 int do_in_path(char_u *path, char_u *name, int flags, void (*callback)(char_u *fname, void *ck), void *cookie);
@@ -21,6 +20,7 @@
 void ex_packadd(exarg_T *eap);
 void remove_duplicates(garray_T *gap);
 int ExpandRTDir(char_u *pat, int flags, int *num_file, char_u ***file, char *dirnames[]);
+int expand_runtime_cmd(char_u *pat, int *numMatches, char_u ***matches);
 int ExpandPackAddDir(char_u *pat, int *num_file, char_u ***file);
 void ex_source(exarg_T *eap);
 void ex_options(exarg_T *eap);