c: Fix a directive of GLVersion for access in DLL.
c: Fix a directive of GLVersion for access in DLL.

QUSpilPrgm/glad,bsmr-opengl/glad,QUSpilPrgm/glad,QUSpilPrgm/glad,bsmr-opengl/glad,bsmr-opengl/glad,bsmr-opengl/glad,QUSpilPrgm/glad