checks for the existence of finite(x) and isinf(x) built into app/gpsymreg.

Linux gcc compilers have the 'macros ??' but solaris gcc does not

eo/app/gpsymreg/node.h

@@ -161,8 +161,11 @@ class Node
 			}
 			
 			// if the result is infinite (positive or negative) or not_a_number (nan) then result becomes 0
+			// however some versions of gcc (e.g. 2.95.2 on solaris) don't have the finite(x) defined
+			#ifdef finite
 			if (!finite(result))
 				result=0;
+			#endif	
 		}
 		
 		template<class Children>