[PATCH] usp10: Handle invalid arguments in ScriptIsComplex()

[Marvin]

Hi,

While running your changed tests on Windows, 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=29873

Your paranoid android.


=== wxppro (32 bit usp10) ===
usp10.c:3938: Test failed: got 0x00000001
09e8:usp10: unhandled exception c0000005 at 74DA37CD

=== w2003std (32 bit usp10) ===
usp10.c:3938: Test failed: got 0x00000001
05f0:usp10: unhandled exception c0000005 at 754A73F9

=== wvistau64 (32 bit usp10) ===
usp10.c:3938: Test failed: got 0x00000001
00c4:usp10: unhandled exception c0000005 at 76089892

=== w2008s64 (32 bit usp10) ===
usp10.c:3938: Test failed: got 0x00000001
0b54:usp10: unhandled exception c0000005 at 76729892

=== wvistau64 (64 bit usp10) ===
usp10.c:3938: Test failed: got 0x00000001
00c4:usp10: unhandled exception c0000005 at 000007FEFEE0119A

=== w2008s64 (64 bit usp10) ===
usp10.c:3938: Test failed: got 0x00000001
07ec:usp10: unhandled exception c0000005 at 000007FEFD9F119A