[PATCH] d2d1: Fix miter drawing for degenerated rectangles.

[Marvin]

Hi,

While running your changed tests, I think I found new failures.
Being a bot and all I'm not very good at pattern recognition, so I might be
wrong, but could you please double-check?

Full results can be found at:
https://testbot.winehq.org/JobDetails.pl?Key=63111

Your paranoid android.


=== w2008s64 (task log) ===

Task errors:
The previous 1 run(s) terminated abnormally

=== debian10 (32 bit report) ===

Report errors:
d2d1:d2d1 has no test summary line (early exit of the main process?)
d2d1:d2d1 has unaccounted for todo messages

=== debian10 (32 bit Chinese:China report) ===

Report errors:
d2d1:d2d1 has no test summary line (early exit of the main process?)
d2d1:d2d1 has unaccounted for todo messages

=== debian10 (build log) ===

X Error of failed request:  GLXBadFBConfig
  Major opcode of failed request:  150 (GLX)
  Minor opcode of failed request:  34 ()
X Error of failed request:  GLXBadFBConfig
  Major opcode of failed request:  150 (GLX)
  Minor opcode of failed request:  34 ()