Added min/max macros if not already defined
Added min/max macros if not already defined

vrogier/ocilib,ljx0305/ocilib,kornefalk/ocilib2017,vrogier/ocilib,kornefalk/ocilib2017,vrogier/ocilib,kornefalk/ocilib2017,ljx0305/ocilib,vrogier/ocilib,ljx0305/ocilib