Description of problem:
I added new column in the task view.

Version-Release number of selected component:
evolution-3.10.4-2.fc20

Additional info:
reporter:       libreport-2.2.2
backtrace_rating: 4
cmdline:        evolution
crash_function: g_malloc0
executable:     /usr/bin/evolution
kernel:         3.14.4-200.fc20.x86_64
runlevel:       N 5
type:           CCpp
uid:            1000

Truncated backtrace:
Thread no. 1 (10 frames)
 #2 g_malloc0 at gmem.c:139
 #3 eti_header_structure_changed at gal-a11y-e-table-item.c:880
 #8 e_table_header_add_column at e-table-header.c:444
 #9 ethi_drag_data_received at e-table-header-item.c:824
 #10 _gtk_marshal_VOID__OBJECT_INT_INT_BOXED_UINT_UINT at gtkmarshalers.c:5444
 #14 g_signal_emit_by_name at gsignal.c:3426
 #15 gtk_drag_selection_received at gtkdnd.c:1923
 #19 g_signal_emit_by_name at gsignal.c:3426
 #20 gtk_selection_retrieval_report at gtkselection.c:2986
 #21 gtk_selection_convert at gtkselection.c:1114