cmake: fix possible LUA_LIBRARIES variable loss, when CMAKE_BUILD_TYPE already set(second and next CMake re-runs)

Author: a1batross

CMakeLists.txt

@@ -17,11 +17,10 @@ set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fpermissive --std=c++17")
 #set(CMAKE_CXX_STANDARD_REQUIRED ON)
 #set(CMAKE_CXX_EXTENSIONS OFF)
 
+set(LUA_LIBRARIES luajit)
+
 if(NOT CMAKE_BUILD_TYPE)
     set(CMAKE_BUILD_TYPE "Release" CACHE STRING "" FORCE)
-    set(LUA_LIBRARIES luajit)
-elseif(${CMAKE_BUILD_TYPE} STREQUAL "RELWITHDEBINFO")
-    set(LUA_LIBRARIES luajit)
 elseif(${CMAKE_BUILD_TYPE} STREQUAL "DEBUG")
     set(LUA_LIBRARIES luajit-debug)
 endif()