crosbot_explore: bugfix message generation

crosbot_explore/CMakeLists.txt

@@ -112,6 +112,7 @@ add_executable(explorer src/nodes/explorer_node.cpp)
 add_dependencies(crosbot_explore
     ${PROJECT_NAME}_gencpp
     ${PROJECT_NAME}_gencfg
+    ${PROJECT_NAME}_generate_messages
 )
 add_dependencies(astar_explorer 
     ${PROJECT_NAME}