[Warnings] Fix linux32's "format ‘%lu’ expects type ‘long unsigned int’, but argument has type ‘size_t’"
Don't crash if pay floater is closed before reply arrives from the server

Fix from upstream
Potentially fixes http://crash.singularityviewer.org/crashes.php?stacktrace=processPayPriceReply
Fix for crash report 1272
Audio engine changes:
-Idle tick is now responsible for dispatching all pending sound sources, as such improves priority sorting.
-Added ui sound precache mechanisms (to fetch sounds without associated soundsources)
-Audio engine no logner available pre-login or upon disconnect, for simplicity.
-General cleanup to the audio engine/impl.
-Fixed some gAudiop calls that were lacking prerequisite null checks.
-Added 'isUpstreamOK' procuedure to LLAssetStorage to allow avoidance of making requests when there is no upstream host connection.
Merge branch 'master' of git://github.com/AlericInglewood/SingularityViewer
Merge branch 'master' of git://github.com/Shyotl/SingularityViewer

Conflicts:
	indra/llaudio/llaudioengine.cpp