[Bug 719524] audiofxbaseiirfilter: check if coefficients are provided inside filter lock

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=719524
  GStreamer | gst-plugins-good | 1.2.1

Stefan Sauer (gstreamer, gtkdoc dev) <ensonic> changed:

           What    |Removed                     |Added
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                 CC|                            |ensonic at sonicpulse.de

--- Comment #2 from Stefan Sauer (gstreamer, gtkdoc dev) <ensonic at sonicpulse.de> 2014-02-08 21:59:24 UTC ---
I think the
if (filter->a == NULL || filter->b == NULL) {
check is there to prevent a programming error. IMHO we should ensure that the
value is != NULL when chaning the value, e.g. in
gst_audio_fx_base_iir_filter_set_coefficients().

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