[GSoC] parse: not show usage help when invalid id

patch for too chatty command when <id> is invalid
ex. git tag --contains <id>

It is possible to skip 'goto show_usage_error' when
parse_long_opt fails? and return directly from there.

Signed-off-by: Roger Solano <redacted>
---
 parse-options.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/parse-options.c b/parse-options.c
index 125e84f98..074915eb3 100644
--- a/parse-options.c
+++ b/parse-options.c

@@ -550,7 +550,7 @@ int parse_options_step(struct parse_opt_ctx_t *ctx,
 			goto show_usage;
 		switch (parse_long_opt(ctx, arg + 2, options)) {
 		case -1:
-			goto show_usage_error;
+			return -1; 
 		case -2:
 			goto unknown;
 		}

-- 
2.13.6