account for inverse-paths when we prealloc storage in the rgn-builder

test inversepath->rgn

BUG=
R=caryclark@google.com

Review URL: https://codereview.chromium.org/27222005

git-svn-id: http://skia.googlecode.com/svn/trunk@11776 2bbb7eff-a529-9590-31e7-b0007b416f81
2 files changed