Minor Coverity Bug fix.

When I was updating immediates to utilize different sizes of booleans, I had
neglected to notice that removing the smallest INT_SIZE (as it was only for
booleans) made the last else condition unnecessarily specified.  This removes
the extraneous check, making the else if just a simple else.



git-svn-id: http://svn.code.sf.net/p/chapel/code/trunk@23652 3a8e244f-b0f2-452b-bcba-4c88e055c3ca