Apply suggestions from code review

Co-authored-by: 6543 <[email protected]>

Author: lunny

services/agit/agit.go

@@ -25,9 +25,9 @@ import (
 func ProcReceive(ctx context.Context, repo *repo_model.Repository, gitRepo *git.Repository, opts *private.HookOptions) ([]private.HookProcReceiveRefResult, error) {
 	results := make([]private.HookProcReceiveRefResult, 0, len(opts.OldCommitIDs))
 	topicBranch := opts.GitPushOptions["topic"]
-	forcePushStr := opts.GitPushOptions["force-push"]
+	forcePushStr, forcePushOK := opts.GitPushOptions["force-push"]
 	var forcePush bool
-	if forcePushStr == "" {
+	if forcePushOK && forcePushStr == "" {
 		forcePush = true
 	} else {
 		forcePush, _ = strconv.ParseBool(forcePushStr)