2012-05-25  pgas  <pgas@pgas-desktop>

	* src/em1.c: signal() -> sigaction()
	* src/em1.c: reset(), setexit() -> sigsetjmp() siglongjmp() 
	* src/em1.c: seek()  -> lseek()
	* ttyn() == "x"  -> use isatty()
	* src/em1.c:  =+, =| ... -> +=, |= ...
	* src/em1.c:  add return type and argument types to function
	* src/em1.c: add int type and = to variable definitions
	* src/em1.c: include headers and forward declaration of the function
	* src/em1.c: use autoconf
