GC guard catch_table_ary in iseq_set_exception_table

	The function iseq_set_exception_table allocates memory which can cause
	a GC compaction to run. Since catch_table_ary is not on the stack, it
	can be moved, which would make tptr incorrect.
	---
	 compile.c | 10 +++++++---
	 1 file changed, 7 insertions(+), 3 deletions(-)