Moved glLineWidth before glBegin otherwise it is invalid

While testing the RetinaSample, I noticed that changing the glLineWidth had no effect. 

"GL_INVALID_OPERATION	 The glLineWidth subroutine is called between a call to glBegin and the corresponding call to glEnd."
http://publib.boulder.ibm.com/infocenter/pseries/v5r3/index.jsp?topic=/com.ibm.aix.opengl/doc/openglrf/glLineWidth.htm