util: Alter virAuthGet*Path API to generate auth->cb error

Rather than forcing the caller to generate an error, let's
generate the Username or Password error message failure if
the auth->cb fails. This is the last error path that needs
a specific message for various callers.
Signed-off-by: NJohn Ferlan <jferlan@redhat.com>
Reviewed-by: NMarcos Paulo de Souza <marcos.souza.org@gmail.com>

src/util/virauth.c

@@ -188,8 +188,11 @@ virAuthGetUsernamePath(const char *path,
         cred.result = NULL;
         cred.resultlen = 0;
 
-        if ((*(auth->cb))(&cred, 1, auth->cbdata) < 0)
+        if ((*(auth->cb))(&cred, 1, auth->cbdata) < 0) {
+            virReportError(VIR_ERR_AUTH_FAILED, "%s",
+                           _("Username request failed"));
             VIR_FREE(cred.result);
+        }
 
         return cred.result;
     }
@@ -266,8 +269,11 @@ virAuthGetPasswordPath(const char *path,
         cred.result = NULL;
         cred.resultlen = 0;
 
-        if ((*(auth->cb))(&cred, 1, auth->cbdata) < 0)
+        if ((*(auth->cb))(&cred, 1, auth->cbdata) < 0) {
+            virReportError(VIR_ERR_AUTH_FAILED, "%s",
+                           _("Password request failed"));
             VIR_FREE(cred.result);
+        }
 
         return cred.result;
     }