fix a buffer underrun when playing incrementally produced streams (i.e. streams that may occasionally return 0 data)
fix a buffer underrun when playing incrementally produced streams (i.e. streams that may occasionally return 0 data)

git-svn-id: 0dc367cf2a1f0872b31aed51a516e91b94972fba@2481 19460358-522e-0410-942e-fdb976ae3ca2

ONatalia/Masterarbeit,ONatalia/Masterarbeit,ONatalia/Masterarbeit,ONatalia/Masterarbeit