m68k.c (m68k_option_override): Check opt_fstack_limit_symbol_arg and opt_fstack_limit_register_no instead of...

gcc/
	* config/m68k/m68k.c (m68k_option_override): Check
	opt_fstack_limit_symbol_arg and opt_fstack_limit_register_no
	instead of stack_limit_rtx.

gcc/testsuite/
	* gcc.target/m68k/stack-limit-1.c: Expect warning on line 0.

From-SVN: r241140