[Bug 735861] dataurisrc: make src thread safe

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=735861
  GStreamer | gst-plugins-bad | unspecified

--- Comment #3 from Vineeth <vineeth.tm at samsung.com> 2014-09-02 08:06:55 UTC ---
Created an attachment (id=285116)
 View: https://bugzilla.gnome.org/attachment.cgi?id=285116
 Review: https://bugzilla.gnome.org/review?bug=735861&attachment=285116

Attaching proposed patch

Removing the else if condition as it will be invalid.

But just to be on safer side, 
unreferencing the buf in else condition.

Please review.

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