Robert Bragg ed06d0ca01 object: avoid creating a new entry for NULL data
If setting NULL user data via cogl_object_set_user_data() and we fail to
find an entry for the given key then bail out before potentially
allocating a new entry since setting NULL data is documented to
effectively delete an entry.

Reviewed-by: Neil Roberts <neil@linux.intel.com>
2012-02-20 23:16:37 +00:00
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