Fix: MSVC build error without TBB

windows.h once more providing min/max macro's when you least want them.

source/blender/editors/sculpt_paint/CMakeLists.txt

@@ -101,11 +101,10 @@ if(WITH_TBB)
     ${TBB_INCLUDE_DIRS}
   )
   add_definitions(-DWITH_TBB)
-  if(WIN32)
-    # TBB includes Windows.h which will define min/max macros
-    # that will collide with the stl versions.
+endif()
+
+if(WIN32)
     add_definitions(-DNOMINMAX)
-  endif()
 endif()
 
 blender_add_lib(bf_editor_sculpt_paint "${SRC}" "${INC}" "${INC_SYS}" "${LIB}")