Changes to build under LynxOS 2.3. Some more changes should be done to
build successfully, e.g. LynxOS 2.3 does not have snprintf().
git-svn-id: svn://svn.code.sf.net/p/tigervnc/code/trunk@571 3789f03b-4d11-0410-bbf8-ca57d06f2519
min and max changed to vncmin and vncmax. This solves many problems: Some platforms predefines or redefines these symbols. Some platforms have header files which chokes if min or max are defined.