CMakeLists.txt: added extra warning flags

Author: eidheim

src/CMakeLists.txt

@@ -1,5 +1,5 @@
 add_definitions(-DBOOST_LOG_DYN_LINK)
-set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -O3 -std=c++11 -pthread -Wall -Wno-reorder")
+set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -O3 -std=c++11 -pthread -Wall -Wextra -Wno-unused-parameter -Wno-reorder")
 set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} "${CMAKE_CURRENT_LIST_DIR}/cmake/Modules/")
 
 if(APPLE)