builtin/credential-store: fix leaking credential

We never free credentials read by the credential store, leading to a
memory leak. Plug it.

Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

builtin/credential-store.c

@@ -218,5 +218,6 @@ int cmd_credential_store(int argc, const char **argv, const char *prefix)
 		; /* Ignore unknown operation. */
 
 	string_list_clear(&fns, 0);
+	credential_clear(&c);
 	return 0;
 }

t/t0302-credential-store.sh

@@ -1,6 +1,8 @@
 #!/bin/sh
 
 test_description='credential-store tests'
+
+TEST_PASSES_SANITIZE_LEAK=true
 . ./test-lib.sh
 . "$TEST_DIRECTORY"/lib-credential.sh
 

t/t0303-credential-external.sh

@@ -29,6 +29,7 @@ you can set GIT_TEST_CREDENTIAL_HELPER_SETUP to a sequence of shell
 commands.
 '
 
+TEST_PASSES_SANITIZE_LEAK=true
 . ./test-lib.sh
 . "$TEST_DIRECTORY"/lib-credential.sh