Fix service server demo (#36)

* Update main.c

* Update CI

Author: pablogs9

.github/workflows/ci.yml

@@ -21,10 +21,10 @@ jobs:
             source /opt/ros/foxy/setup.bash
             source install/local_setup.bash
             ros2 run micro_ros_setup create_firmware_ws.sh host
-            rm -rf uros/micro-ROS-demos
+            rm -rf src/uros/micro-ROS-demos
         - uses: actions/checkout@v2
           with:
-            path: uros/micro-ROS-demos
+            path: src/uros/micro-ROS-demos
         - name: Build
           run: |
             cd /uros_ws

rclc/addtwoints_server/main.c

@@ -8,8 +8,8 @@
 #include <stdio.h>
 #include <unistd.h>
 
-#define RCCHECK(fn) { rcl_ret_t temp_rc = fn; if((temp_rc != RCL_RET_OK)){printk("Failed status on line %d: %d. Aborting.\n",__LINE__,(int)temp_rc);}}
-#define RCSOFTCHECK(fn) { rcl_ret_t temp_rc = fn; if((temp_rc != RCL_RET_OK)){printk("Failed status on line %d: %d. Continuing.\n",__LINE__,(int)temp_rc);}}
+#define RCCHECK(fn) { rcl_ret_t temp_rc = fn; if((temp_rc != RCL_RET_OK)){printf("Failed status on line %d: %d. Aborting.\n",__LINE__,(int)temp_rc);}}
+#define RCSOFTCHECK(fn) { rcl_ret_t temp_rc = fn; if((temp_rc != RCL_RET_OK)){printf("Failed status on line %d: %d. Continuing.\n",__LINE__,(int)temp_rc);}}
 
 void service_callback(const void * req, void * res){
   example_interfaces__srv__AddTwoInts_Request * req_in = (example_interfaces__srv__AddTwoInts_Request *) req;