mshtml: Check if event_table entry is allocated before using it in remove_event_handler.

[testbot at testbot.winehq.org]

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
http://testbot.winehq.org/JobDetails.pl?Key=2632

Your paranoid android.


=== W2K3R2SESP2 (32 bit events) ===
events.c:847: Test failed: y = -89
events.c:847: Test failed: clientY = -89
events.c:847: Test failed: offsetY = -91
events.c:847: Test failed: screenY = 0
events.c:847: Test failed: y = -89
events.c:847: Test failed: clientY = -89
events.c:847: Test failed: offsetY = -91
events.c:847: Test failed: screenY = 0
events.c:847: Test failed: y = -89
events.c:847: Test failed: clientY = -89
events.c:847: Test failed: offsetY = -91
events.c:847: Test failed: screenY = 0
events.c:847: Test failed: y = -89
events.c:847: Test failed: clientY = -89
events.c:847: Test failed: offsetY = -91
events.c:847: Test failed: screenY = 0

=== W7PRO (32 bit events) ===
events.c:847: Test failed: y = -155
events.c:847: Test failed: clientY = -155
events.c:847: Test failed: offsetY = -157
events.c:847: Test failed: screenY = 0
events.c:847: Test failed: y = -155
events.c:847: Test failed: clientY = -155
events.c:847: Test failed: offsetY = -157
events.c:847: Test failed: screenY = 0
events.c:847: Test failed: y = -155
events.c:847: Test failed: clientY = -155
events.c:847: Test failed: offsetY = -157
events.c:847: Test failed: screenY = 0
events.c:847: Test failed: y = -155
events.c:847: Test failed: clientY = -155
events.c:847: Test failed: offsetY = -157
events.c:847: Test failed: screenY = 0

=== W7PROX64 (32 bit events) ===
events.c:847: Test failed: y = -80
events.c:847: Test failed: clientY = -80
events.c:847: Test failed: offsetY = -82
events.c:847: Test failed: screenY = 0
events.c:847: Test failed: y = -80
events.c:847: Test failed: clientY = -80
events.c:847: Test failed: offsetY = -82
events.c:847: Test failed: screenY = 0
events.c:847: Test failed: y = -80
events.c:847: Test failed: clientY = -80
events.c:847: Test failed: offsetY = -82
events.c:847: Test failed: screenY = 0
events.c:847: Test failed: y = -80
events.c:847: Test failed: clientY = -80
events.c:847: Test failed: offsetY = -82
events.c:847: Test failed: screenY = 0

=== W7PROX64 (64 bit events) ===
events.c:847: Test failed: x = -33
events.c:847: Test failed: y = -205
events.c:847: Test failed: clientX = -33
events.c:847: Test failed: clientY = -205
events.c:847: Test failed: offsetX = -35
events.c:847: Test failed: offsetY = -207
events.c:847: Test failed: screenY = 0
events.c:847: Test failed: x = -33
events.c:847: Test failed: y = -205
events.c:847: Test failed: clientX = -33
events.c:847: Test failed: clientY = -205
events.c:847: Test failed: offsetX = -35
events.c:847: Test failed: offsetY = -207
events.c:847: Test failed: screenY = 0
events.c:847: Test failed: x = -33
events.c:847: Test failed: y = -205
events.c:847: Test failed: clientX = -33
events.c:847: Test failed: clientY = -205
events.c:847: Test failed: offsetX = -35
events.c:847: Test failed: offsetY = -207
events.c:847: Test failed: screenY = 0
events.c:847: Test failed: x = -33
events.c:847: Test failed: y = -205
events.c:847: Test failed: clientX = -33
events.c:847: Test failed: clientY = -205
events.c:847: Test failed: offsetX = -35
events.c:847: Test failed: offsetY = -207
events.c:847: Test failed: screenY = 0