Changed maxInputCount for exact inputCount

Processing still had issue when the number of inputs was 0, so I changed my previous fix from a maximum input count to an exact input count. -1 is used when the input count isn't fixed (but still has to be a non-negative number).

BUG=
R=senorblanco@chromium.org, reed@google.com, sugoi@google.com, bsalomon@google.com

Author: sugoi@chromium.org

Review URL: https://codereview.chromium.org/100803004

git-svn-id: http://skia.googlecode.com/svn/trunk@12492 2bbb7eff-a529-9590-31e7-b0007b416f81
4 files changed