fix inspect method
Merge pull request #981 from iij/pr-fix-inspect

fix inspect method
Fix indents.
Use suitable types for variables.
Use suitable types for variables.
Add static declaration
Replace tabs with spaces
Remove unused return value in mruby.c
Merge pull request #991 from kano4/add_static

Add static declaration
Merge pull request #983 from monaka/pr-fix-indent-in-parse.y-20130312

Fix indents in parse.y.
Merge pull request #988 from monaka/pr-use-suitable-types-20130312

Use suitable types for variables.
Merge pull request #990 from monaka/pr-use-suitable-types-in-sprintf.c-20130312

Use suitable types for variables.
Merge pull request #992 from kano4/unused

Remove unused return value in mruby.c