tests/unit-test-client.c: Fix curly braces.

tests/unit-test-client.c

@@ -49,7 +49,7 @@ int main(int argc, char *argv[])
     if (argc > 1) {
         if (strcmp(argv[1], "tcp") == 0) {
             use_backend = TCP;
-        if (strcmp(argv[1], "tcppi") == 0) {
+	} else if (strcmp(argv[1], "tcppi") == 0) {
             use_backend = TCP_PI;
         } else if (strcmp(argv[1], "rtu") == 0) {
             use_backend = RTU;
@@ -66,7 +66,7 @@ int main(int argc, char *argv[])
         ctx = modbus_new_tcp("127.0.0.1", 1502);
     } else if (use_backend == TCP_PI) {
         ctx = modbus_new_tcp_pi("::1", "1502");
-    } else
+    } else {
         ctx = modbus_new_rtu("/dev/ttyUSB1", 115200, 'N', 8, 1);
     }
     if (ctx == NULL) {