fix C4146

CMakeLists.txt

@@ -14,7 +14,7 @@ endif()
 if(MSVC)
     set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} /utf-8 /jumptablerdata")
     set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} /experimental:c11atomics")
-    add_compile_options(/wd4267 /wd4244)
+    add_compile_options(/wd4267 /wd4244 /wd4146)
 
     if(NOT CMAKE_BUILD_TYPE STREQUAL "Debug")
         set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} /Ox")