**System Information**
Windows 10
Intel HD 5500
**Blender Version**
Broken: Debug build, unknown hash. Can also be reproduced with official builds.
Worked: N/A
**Short description of error**
Blender Crashes when adding a white balance modifier in the sequencer.
```
# Blender 2.76 (sub 5), Commit date: 1970-01-01 00:00, Hash unknown
bpy.context.space_data.system_bookmarks_active = 1 # Property
bpy.context.space_data.system_folders_active = 0 # Property
bpy.context.space_data.system_bookmarks_active = 1 # Property
bpy.context.space_data.system_bookmarks_active = 0 # Property
bpy.context.space_data.system_bookmarks_active = 1 # Property
bpy.context.space_data.system_folders_active = 0 # Property
bpy.ops.sequencer.image_strip_add(directory="C:\\Users\\Admin\\Downloads\\", files=[{"name":"BGE_Introduction_ScreenShot.jpg", "name":"BGE_Introduction_ScreenShot.jpg"}], relative_path=True, show_multiview=False, frame_start=1, frame_end=26, channel=1) # Operator
bpy.ops.sequencer.strip_modifier_add(type='WHITE_BALANCE') # Operator
# backtrace
21: BLI_system_backtrace - 0xFE2E4960
20: blender_crash_handler_backtrace - 0xFD038BE0
19: blender_crash_handler - 0xFD038C30
18: windows_exception_handler - 0xFD038EB0
17: UnhandledExceptionFilter - 0x76E7C80
16: memset - 0xA8CB600
15: _C_specific_handler - 0xA8B5790
14: _chkstk - 0xA8C9700
13: RtlImageNtHeaderEx - 0xA8547E0
12: KiUserExceptionDispatcher - 0xA8C88D0
11: failwithmessage - 0x1723B80
10: _RTC_StackFailure - 0x1723980
9: _RTC_CheckStackVars - 0x17234C0
8: whiteBalance_apply_threaded - 0xFDD7D5F0
7: modifier_do_thread - 0xFDD7D340
6: processor_apply_func - 0xFE2C8900
5: task_scheduler_thread_run - 0xFE32F9D0
4: sched_get_priority_max - 0xF33212FD
3: sched_get_priority_max - 0xF33212FD
2: sched_get_priority_max - 0xF33212FD
1: BaseThreadInitThunk - 0xA7880E0
0: RtlUserThreadStart - 0xA87C2B0
```
Seams to be crashing above this point:
https://developer.blender.org/diffusion/B/browse/master/source/blender/blenkernel/intern/seqmodifier.c$234
**Exact steps for others to reproduce the error**
Add white balance modifier to an image. Image used: {F271083}