GiNaC/ginac inifcns_trans.cpp utils.cpp utils.h

[Christian Bauer]

Update of /home/cvs/GiNaC/ginac

Modified Files:
	inifcns_trans.cpp utils.cpp utils.h 
Log Message:
- fixed atan2_evalf()
- improved eval functions of trigonometric functions (mostly negative
  arguments)
- added #undef log2 in utils.h (may help with cygwin?)