remove Sync calls at the start of the sequence
remove Sync calls at the start of the sequence

This is a hack, and needs to be better thought-out.
There may be other, similar cases to consider.

Currently, Sync() calls at the start of a sequence
seem to confuse the compiler, and don't serve
any obvious meaningful purpose (at best, they're a nop)

BBN-Q/pyqgl2,BBN-Q/pyqgl2