[ft] header file

[使用说明]

when I compile project that use freetype lib, it tell me:
error C2006: #include expected a filename, found 'identifier'.
the error seem from include macro definition.

#include FT_FREETYPE_H
#include FT_GLYPH_H 

freetype use macro to define the head file. but when I clean built
file(obj,lib...) and rebuild project again it is ok. how to solve the
problem?