Use the new partial parsing when checking for fixed zones.
Use the new partial parsing when checking for fixed zones.

malcolmr/nodatime,jskeet/nodatime,nodatime/nodatime,malcolmr/nodatime,zaccharles/nodatime,zaccharles/nodatime,zaccharles/nodatime,zaccharles/nodatime,zaccharles/nodatime,nodatime/nodatime,malcolmr/nodatime,malcolmr/nodatime,zaccharles/nodatime,jskeet/nodatime,BenJenkinson/nodatime,BenJenkinson/nodatime