[PDF] Fix ending condition for font advance construction.
[PDF] Fix ending condition for font advance construction.

The old code always ended (the last sequence of glyphs) on a range, even if there was a very long run at the end.  This fixes that.

Review URL: http://codereview.appspot.com/4539045

git-svn-id: e8541e15acce502a64c929015570ad1648e548cd@1293 2bbb7eff-a529-9590-31e7-b0007b416f81

Cue/skia,Cue/skia,mrobinson/skia,metajack/skia,metajack/skia,mrobinson/skia,Cue/skia,metajack/skia,mrobinson/skia,mrobinson/skia,Cue/skia,mrobinson/skia,metajack/skia