Fix nil reference in repo generation (#9660)

* Fix nil reference

Signed-off-by: jolheiser <john.olheiser@gmail.com>

* Tighten

Signed-off-by: jolheiser <john.olheiser@gmail.com>

models/repo_generate.go

@@ -124,6 +124,7 @@ func generateRepoCommit(e Engine, repo, templateRepo, generateRepo *Repository,
 		return fmt.Errorf("checkGiteaTemplate: %v", err)
 	}
 
+	if gt != nil {
 		if err := os.Remove(gt.Path); err != nil {
 			return fmt.Errorf("remove .giteatemplate: %v", err)
 		}
@@ -161,6 +162,7 @@ func generateRepoCommit(e Engine, repo, templateRepo, generateRepo *Repository,
 				return err
 			}
 		}
+	}
 
 	if err := git.InitRepository(tmpDir, false); err != nil {
 		return err