uci: properly close input before exit

Signed-off-by: Hans Dedecker <dedeckeh@gmail.com>

cli.c

@@ -687,6 +687,7 @@ int main(int argc, char **argv)
 				break;
 			case 'f':
 				if (input != stdin) {
+					fclose(input);
 					perror("uci");
 					return 1;
 				}