kh_resize_##name bug fixed.
Change parameter type to suppress -Wsign-compare warnings
Merge pull request #1349 from mirichi/khash

kh_resize_##name bug fixed.
Merge pull request #1352 from k-tsj/change-param-type-to-suppress-warnings

Change parameter type to suppress -Wsign-compare warnings
It optimizes more.
call Class#inherited when Class.new(klass)
Merge pull request #1353 from mirichi/khash

khash.h optimizes more.
Merge pull request #1354 from wanabe/call-inherited

call Class#inherited when Class.new(klass)
Merge git://github.com/mruby/mruby into primitive