gdi32 (1/2): fix runaway loop because of unsigned comparison in BIDI_Reorder

[Alexander Dorofeyev]

It was crashing with right to left strings because loop condition k >= lastgood
always evaluated to true, when lastgood is 0.
---
     dlls/gdi32/bidi.c |    4 ++--
     1 files changed, 2 insertions(+), 2 deletions(-)



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