submodule: fix style in function definition

The definitions of 'verify_submodule_committish()' and
'print_submodule_summary()' had wrong styling in terms of the asterisk
placement. Amend them.

Also, the warning printed in case of an unexpected file mode printed the
mode in decimal. Print it in octal for enhanced readability.

Reported-by: Kaartic Sivaraam <kaartic.sivaraam@gmail.com>
Mentored-by: Christian Couder <chriscool@tuxfamily.org>
Mentored-by: Kaartic Sivaraam <kaartic.sivaraam@gmail.com>
Helped-by: Junio C Hamano <gitster@pobox.com>
Signed-off-by: Shourya Shukla <shouryashukla.oo@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

builtin/submodule--helper.c

@@ -959,7 +959,7 @@ enum diff_cmd {
 	DIFF_FILES
 };
 
-static char* verify_submodule_committish(const char *sm_path,
+static char *verify_submodule_committish(const char *sm_path,
 					 const char *committish)
 {
 	struct child_process cp_rev_parse = CHILD_PROCESS_INIT;
@@ -979,7 +979,7 @@ static char* verify_submodule_committish(const char *sm_path,
 	return strbuf_detach(&result, NULL);
 }
 
-static void print_submodule_summary(struct summary_cb *info, char* errmsg,
+static void print_submodule_summary(struct summary_cb *info, char *errmsg,
 				    int total_commits, const char *displaypath,
 				    const char *src_abbrev, const char *dst_abbrev,
 				    struct module_cb *p)
@@ -1056,7 +1056,7 @@ static void generate_submodule_summary(struct summary_cb *info,
 		} else {
 			/* for a submodule removal (mode:0000000), don't warn */
 			if (p->mod_dst)
-				warning(_("unexpected mode %d\n"), p->mod_dst);
+				warning(_("unexpected mode %o\n"), p->mod_dst);
 		}
 	}