Updated to fix the following problems:
Updated to fix the following problems:

1. Y movement was reversed compared to other input handlers.
2. Mouse wheel movement was reset to 0 before it could be read.


git-svn-id: 5afc437a751a4ff2ced778146f5faadda0b504ab@2500 75d07b2b-3a1a-0410-a2c5-0572b91ccdca

chototsu/MikuMikuStudio,chototsu/MikuMikuStudio,chototsu/MikuMikuStudio,chototsu/MikuMikuStudio