Make static analysis happy about the length of patternBuf
Make static analysis happy about the length of patternBuf

Summary: The static analysis doesn't quite understand that we are assigning a NUL to, at most, `patternBuf[MAX_PATH + 1]` so increase the buffer size slightly to make it happy.

Reviewed By: yfeldblum

Differential Revision: D3571923

fbshipit-source-id: c027e2b253dc3e56d13e9a15a0e960a6aa3a0e6c

floxard/folly,facebook/folly,rklabs/folly,mqeizi/folly,Orvid/folly,Orvid/folly,facebook/folly,rklabs/folly,floxard/folly,rklabs/folly,facebook/folly,Orvid/folly,charsyam/folly,Orvid/folly,floxard/folly,facebook/folly,rklabs/folly,rklabs/folly,mqeizi/folly,Orvid/folly,mqeizi/folly,facebook/folly,mqeizi/folly,mqeizi/folly,charsyam/folly,floxard/folly,charsyam/folly,charsyam/folly,floxard/folly