always prompts two error message when playback unsupported media

[Churchy Zheng]

when attempt to playback a unsupported media eg MID_WMV8_WMA8.wmv, then it will prompt error window: the stream type is not supported..... click Close button twice to close the two error message windows.

steps:
 1. launch moblin media
 2. single click to select a unsupported media eg MID_WMV8_WMA8.wmv
 3. single click again to attempt to play it. then it prompts two error message.

expected result:
 only prompt one error message and click one time to close error window.

[Rusty Lynch (rusty-lynch-intel)]

In some conditions we were actually attempting to play the video twice (with one play request on top of another), resulting in multiple error messages if both play request failed.

A fix has been committed to source, and will be available for testing in version 0.40

[Jessica Ji (jessica-ji)]

this bug still can easy to reproduce.

[Mauri Whalen (mauri-whalen)]

See Rusty for Fix.

[John L. Villalovos (happycamp)]

I have committed a fix for this issue.

[dandan.hong@intel.com (dandan-hong)]

Retest this in moblin-media v0.49,the issue has gone.So change to "Fix released".