[IMCC] Fixed some signedness mismatch warnings in the register allocator.  No functional changes, unless you count the possibility of additional correctness in excessively unlikely possibilities a functional change.
[IMCC] Fixed some signedness mismatch warnings in the register allocator.  No
functional changes, unless you count the possibility of additional correctness
in excessively unlikely possibilities a functional change.

git-svn-id: 6e74a02f85675cec270f5d931b0f6998666294a3@39783 d31e2699-5ff4-0310-a27c-f18f2fbe73fe

FROGGS/parrot,FROGGS/parrot,gagern/parrot,FROGGS/parrot,gagern/parrot,parrot/parrot,parrot/parrot,tkob/parrot,tewk/parrot-select,fernandobrito/parrot,parrot/parrot,parrot/parrot,tkob/parrot,fernandobrito/parrot,fernandobrito/parrot,youprofit/parrot,fernandobrito/parrot,youprofit/parrot,tewk/parrot-select,tewk/parrot-select,parrot/parrot,gitster/parrot,tkob/parrot,tewk/parrot-select,youprofit/parrot,tkob/parrot,tewk/parrot-select,tkob/parrot,gitster/parrot,FROGGS/parrot,tewk/parrot-select,tkob/parrot,FROGGS/parrot,youprofit/parrot,gagern/parrot,gitster/parrot,gitster/parrot,FROGGS/parrot,tkob/parrot,tewk/parrot-select,gitster/parrot,gagern/parrot,gagern/parrot,fernandobrito/parrot,gagern/parrot,youprofit/parrot,youprofit/parrot,gagern/parrot,fernandobrito/parrot,gitster/parrot,FROGGS/parrot,gitster/parrot,tkob/parrot,FROGGS/parrot,fernandobrito/parrot,youprofit/parrot,youprofit/parrot