Handled the case where int and float are of correct format, but large. The GLSL spec is not very clear on how integers should be interpreted for expressions. C99 says the expression is of type intmax_t. I am parsing all integers as int except those in expressions, which are being parsed as unsigned int.
Review URL: https://codereview.appspot.com/6351051

git-svn-id: https://angleproject.googlecode.com/svn/trunk@1179 736b8ea6-26fd-11df-bfd4-992fa37f6226