avoid two times error msg about invalid state

src/lxc/lxc_wait.c

@@ -79,10 +79,9 @@ static int fillwaitedstates(char *strstates, int *states)
 	while (token) {
 
 		state = lxc_str2state(token);
-		if (state < 0) {
-			ERROR("invalid state %s", token);
+		if (state < 0)
 			return -1;
-		}
+
 		states[state] = 1;
 
 		token = strtok_r(NULL, "|", &saveptr);

src/lxc/state.c

@@ -56,7 +56,7 @@ lxc_state_t lxc_str2state(const char *state)
 		if (!strcmp(strstate[i], state))
 			return i;
 
-	ERROR("invalid specified state %s", state);
+	ERROR("invalid state '%s'", state);
 	return -1;
 }