vdropl() drops the vnode interlock.  Thus, the code in the QUOTA case that upgrades the vnode lock if it is share locked was dropping the interlock before actually checking VI_DOOMED.  Fix this by do the vdropl() after the check and relying on it to drop the vnode interlock.
vdropl() drops the vnode interlock.  Thus, the code in the QUOTA case that
upgrades the vnode lock if it is share locked was dropping the interlock
before actually checking VI_DOOMED.  Fix this by do the vdropl() after the
check and relying on it to drop the vnode interlock.

Reported by:	pho
Reviewed by:	kib
MFC after:	1 week

jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase