libtracefs: Fix enum type in read_event_state

The state variable is of type event_state but is assigned
TRACEFS_ERROR(-1) of type tracefs_enable_state which has no
corresponding event_state name. Fix this by assigning STATE_ERROR(4).

Link: https://lore.kernel.org/20250530225426.721741-1-irogers@google.com
Reported-by: Asmaa AbdelGhany <asmok@google.com>
Signed-off-by: Ian Rogers <irogers@google.com>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
diff --git a/src/tracefs-events.c b/src/tracefs-events.c
index 5515d15..1576153 100644
--- a/src/tracefs-events.c
+++ b/src/tracefs-events.c
@@ -1459,7 +1459,7 @@
 		*state = STATE_MIXED;
 		break;
 	default:
-		*state = TRACEFS_ERROR;
+		*state = STATE_ERROR;
 		ret = -1;
 		break;
 	}