functions like got_error_path use `get_custom_err' to get a statically
allocated struct got_custom_error that's on static array of errors (used
as a ring.)  it's nice and simple, but the drawbacks is that custom
errors shouldn't be used "for too long" because they can be overwritten.

One example of such is `got info':

	% got info $(jot 30)
	work tree: /home/op/w/got
	work tree base commit: 6adac3028e24cdb048ee573633ce056b74a5b360
	work tree path prefix: /
	work tree branch reference: refs/heads/main
	work tree UUID: e873031f-1f7e-42b7-96b4-04afb872b83a
	repository: /home/op/git/got.git
	got: 24: bad path

where i would have expected "got: 1: bad path".  it's a nitpick, but
it's also easy to fix.  ok?

diff /home/op/w/got
commit - 575dd20f850659c3caa159936f3fa7e88867b8a7
path + /home/op/w/got
blob - 77ab232b3e3dd99d8500f2e4792976396ecafda9
file + got/got.c
--- got/got.c
+++ got/got.c
@@ -13095,8 +13095,7 @@ cmd_info(int argc, char *argv[])
 			 * Assume this path will fail. This will be corrected
 			 * in print_path_info() in case the path does suceeed.
 			 */
-			pe->data = (void *)got_error_path(pe->path,
-			    GOT_ERR_BAD_PATH);
+			pe->data = (void *)got_error(GOT_ERR_BAD_PATH);
 		}
 		error = got_worktree_path_info(worktree, &paths,
 		    print_path_info, &paths, check_cancelled, NULL);
@@ -13104,7 +13103,8 @@ cmd_info(int argc, char *argv[])
 			goto done;
 		TAILQ_FOREACH(pe, &paths, entry) {
 			if (pe->data != NULL) {
-				error = pe->data; /* bad path */
+				error = got_error_path(pe->path,
+				    GOT_ERR_BAD_PATH);
 				break;
 			}
 		}