Fix some errors with config loading

sway/commands.c

@@ -368,5 +368,8 @@ int handle_command(struct sway_config *config, char *exec) {
 		free(argv[i]);
 	}
 	free(argv);
+	if (ret != 0) {
+		sway_log(L_ERROR, "Command failed: %s", cmd);
+	}
 	return ret;
 }

sway/main.c

@@ -43,8 +43,8 @@ int main(int argc, char **argv) {
 	}
 
 	setenv("DISPLAY", ":1", 1);
-	if (load_config()) {
-		exit(1);
+	if (!load_config()) {
+		sway_abort("Unable to load config");
 	}
 
 	wlc_run();