[glib-networking] mock-pkcs11: avoid leak of mock_search_template_label

[Michael Catanzaro <mcatanzaro src gnome org>]

commit c7c567e14e06ca84ad92283c34bcdaa680a55d40
Author: Michael Catanzaro <mcatanzaro gnome org>
Date:   Tue Apr 20 16:36:26 2021 -0500

    mock-pkcs11: avoid leak of mock_search_template_label
    
    It could be leaked if this condition executes twice during the for loop
    iteration. Not likely, but let's be robust and placate Coverity, even if
    this is only test code.

 tls/tests/mock-pkcs11.c | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/tls/tests/mock-pkcs11.c b/tls/tests/mock-pkcs11.c
index a1a5a53..988a947 100644
--- a/tls/tests/mock-pkcs11.c
+++ b/tls/tests/mock-pkcs11.c
@@ -1308,6 +1308,7 @@ CK_DEFINE_FUNCTION(CK_RV, C_FindObjectsInit)(CK_SESSION_HANDLE hSession, CK_ATTR
                 else if (CKA_LABEL == pTemplate[i].type)
                 {
                         const char *cka_label_value = (char*)pTemplate[i].pValue;
+                        g_clear_pointer (&mock_search_template_label, g_free);
                         mock_search_template_label = g_strndup (cka_label_value, pTemplate[i].ulValueLen);
                 }
                 else