cmake: make some compile definitions global in Windows

cmake/Modules/winconf.cmake

@@ -9,7 +9,10 @@ set(LibtorrentRasterbar_CUSTOM_DEFINITIONS
     -DBOOST_EXCEPTION_DISABLE
     -DBOOST_SYSTEM_STATIC_LINK=1
     -DTORRENT_USE_OPENSSL
-    -DUNICODE
+    -D__USE_W32_SOCKETS
+    -D_FILE_OFFSET_BITS=64)
+
+add_definitions(-DUNICODE
     -D_UNICODE
     -DWIN32
     -D_WIN32
@@ -18,9 +21,7 @@ set(LibtorrentRasterbar_CUSTOM_DEFINITIONS
     -D_WIN32_IE=0x0500
     -D_CRT_SECURE_NO_DEPRECATE
     -D_SCL_SECURE_NO_DEPRECATE
-    -D__USE_W32_SOCKETS
-    -D_FILE_OFFSET_BITS=64)
-
+)
 # and boost
 set(Boost_USE_STATIC_LIBS  True)
 # set(Boost_USE_STATIC_RUNTIME True)