[PATCH] comdlg32: Avoid crash in RemoveControlItem.

[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=103829

Your paranoid android.


=== w7u_2qxl (32 bit report) ===

comdlg32:
itemdlg: Timeout

=== w7u_adm (32 bit report) ===

comdlg32:
itemdlg: Timeout

=== w7u_el (32 bit report) ===

comdlg32:
itemdlg: Timeout

=== w1064v1507 (32 bit report) ===

comdlg32:
itemdlg: Timeout

=== w1064v1809 (32 bit report) ===

comdlg32:
itemdlg: Timeout

=== w1064 (32 bit report) ===

comdlg32:
itemdlg: Timeout

=== w1064_tsign (32 bit report) ===

comdlg32:
itemdlg: Timeout

=== w10pro64 (32 bit report) ===

comdlg32:
itemdlg: Timeout

=== w1064v1507 (64 bit report) ===

comdlg32:
itemdlg: Timeout

=== w1064v1809 (64 bit report) ===

comdlg32:
itemdlg: Timeout

=== w1064 (64 bit report) ===

comdlg32:
itemdlg: Timeout

=== w1064_2qxl (64 bit report) ===

comdlg32:
itemdlg: Timeout

=== w1064_tsign (64 bit report) ===

comdlg32:
itemdlg: Timeout

=== w10pro64 (64 bit report) ===

comdlg32:
itemdlg: Timeout

=== w10pro64_ar (64 bit report) ===

comdlg32:
itemdlg: Timeout

=== w10pro64_he (64 bit report) ===

comdlg32:
itemdlg: Timeout

=== w10pro64_ja (64 bit report) ===

comdlg32:
itemdlg: Timeout

=== w10pro64_zh_CN (64 bit report) ===

comdlg32:
itemdlg: Timeout