fix macro name.

Author: nobu

ext/ruby_debug/extconf.rb

@@ -15,7 +15,7 @@
 }
 
 if RUBY_REVISION >= 26959 # rb_iseq_compile_with_option was added an argument filepath  
-  $CFLAGS << ' -DRB_ISEQ_COMPILE_6ARGS'
+  $defs << '-DRB_ISEQ_COMPILE_5ARGS'
 end
 
 dir_config("ruby")

ext/ruby_debug/ruby_debug.c

@@ -22,7 +22,7 @@
 
 int rb_vm_get_sourceline(const rb_control_frame_t *cfp); /* from vm.c */
 /* from iseq.c */
-#ifdef RB_ISEQ_COMPILE_6ARGS
+#ifdef RB_ISEQ_COMPILE_5ARGS
 VALUE rb_iseq_compile_with_option(VALUE src, VALUE file, VALUE filepath, VALUE line, VALUE opt);
 #else
 VALUE rb_iseq_compile_with_option(VALUE src, VALUE file, VALUE line, VALUE opt);
@@ -687,7 +687,7 @@ create_catch_table(debug_context_t *debug_context, unsigned long cont)
     GET_THREAD()->parse_in_eval++;
     GET_THREAD()->mild_compile_error++;
     /* compiling with option Qfalse (no options) prevents debug hook calls during this catch routine */
-#ifdef RB_ISEQ_COMPILE_6ARGS
+#ifdef RB_ISEQ_COMPILE_5ARGS
     catch_table->iseq = rb_iseq_compile_with_option(
         rb_str_new_cstr("begin\nend"), rb_str_new_cstr("(exception catcher)"), Qnil, INT2FIX(1), Qfalse);
 #else