Fix TAG_THROW through require [Bug #18562]

	Previously this was being incorrectly swapped with TAG_RAISE in the next
	line. This would end up checking the T_IMEMO throw_data to the exception
	handling (which calls Module#===). This happened to not break existing
	tests because Module#=== returned false when klass is NULL.

	This commit handles throw from require correctly by jumping to the tag
	retaining the TAG_THROW state.
	---
	 load.c                      |  2 +-
	 test/ruby/test_exception.rb | 21 +++++++++++++++++++++
	 2 files changed, 22 insertions(+), 1 deletion(-)