Description of problem:
I pressed the "Preferences" button in the volume settings several times.
The button did not do anything, apart from crashing the volume control.

Version-Release number of selected component:
mate-media-1.6.1-1.fc20

Additional info:
reporter:       libreport-2.2.2
backtrace_rating: 4
cmdline:        mate-volume-control
crash_function: mate_volume_control_track_free
executable:     /usr/bin/mate-volume-control
kernel:         3.14.8-200.fc20.x86_64
runlevel:       N 5
type:           CCpp
uid:            1000

Truncated backtrace:
Thread no. 1 (10 frames)
 #0 mate_volume_control_track_free at track.c:585
 #1 mate_volume_control_element_change at element.c:332
 #2 window_change_mixer_element at window.c:162
 #3 g_cclosure_marshal_VOID__STRINGv at gmarshal.c:1004
 #4 _g_closure_invoke_va at gclosure.c:840
 #7 g_settings_real_change_event at gsettings.c:288
 #8 ffi_call_unix64 at ../src/x86/unix64.S:76
 #9 ffi_call at ../src/x86/ffi64.c:522
 #10 g_cclosure_marshal_generic_va at gclosure.c:1550
 #11 _g_closure_invoke_va at gclosure.c:840

Potential duplicate: bug 890267