Changed min/max functions to pqp_min/pqp_max since these methods could result...

Changed min/max functions to pqp_min/pqp_max since these methods could result in errors when min/max macros are defined within other libraries.

git-svn-id: http://svn.code.sf.net/p/simox/code/trunk@611 042f3d55-54a8-47e9-b7fb-15903f145c44