Cmake: Added level restriction for msvc 2013

cmake/compiler/msvc/settings.cmake

@@ -1,6 +1,12 @@
 # set up output paths for executable binaries (.exe-files, and .dll-files on DLL-capable platforms)
 set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/bin)
 
+set(MSVS_EXPECTED_VERSION 18.0)
+
+if(CMAKE_CXX_COMPILER_VERSION VERSION_LESS MSVS_EXPECTED_VERSION)
+  message(FATAL_ERROR "MSVC: TrinityCore requires version ${MSVS_EXPECTED_VERSION} (MSVC 2013) to build but found ${CMAKE_CXX_COMPILER_VERSION}")
+endif()
+
 # set up output paths ofr static libraries etc (commented out - shown here as an example only)
 #set(CMAKE_LIBRARY_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/bin)
 #set(CMAKE_ARCHIVE_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/bin)