Local fix (#1699)

* fix coding style

* fix conflict

* fix security bug

modules/perception/lib/base/file_util.cc

@@ -157,6 +157,7 @@ bool FileUtil::GetFileContent(const string& path, string* content) {
     size = ::read(fd, data + has_read, fsize - has_read);
     if (size < 0) {
       AWARN << "failed to read file: " << path;
+      ::close(fd);
       return false;
     }
     has_read += size;

modules/perception/obstacle/lidar/visualizer/opengl_visualizer/glfw_viewer.cc

@@ -563,6 +563,11 @@ void GLFWViewer::GetClassColor(int cls, float rgb[3]) {
     rgb[1] = 0;
     rgb[2] = 0;  // red
     break;
+  default:
+    rgb[0] = 1;
+    rgb[1] = 1;
+    rgb[2] = 1;  // white
+    break;
   }
 }