BulletSim: fix vehicles being shot in the air at border crossings because of mis-application of correction to postion for below groundness.
BulletSim: fix vehicles being shot in the air at border crossings because of mis-application of correction to postion for below groundness.

OpenSimian/opensimulator,EriHoss/OpenSim_0.8.2.0_Dev_LibLSLCC,ft-/opensim-optimizations-wip-extras,EriHoss/OpenSim_0.8.2.0_Dev_LibLSLCC,ft-/arribasim-dev-tests,M-O-S-E-S/opensim,ft-/opensim-optimizations-wip-tests,EriHoss/OpenSim_0.8.2.0_Dev_LibLSLCC,ft-/opensim-optimizations-wip-tests,rryk/omp-server,rryk/omp-server,Michelle-Argus/ArribasimExtract,OpenSimian/opensimulator,ft-/opensim-optimizations-wip,QuillLittlefeather/opensim-1,M-O-S-E-S/opensim,QuillLittlefeather/opensim-1,TomDataworks/opensim,RavenB/opensim,Michelle-Argus/ArribasimExtract,ft-/arribasim-dev-extras,OpenSimian/opensimulator,rryk/omp-server,BogusCurry/arribasim-dev,Michelle-Argus/ArribasimExtract,RavenB/opensim,M-O-S-E-S/opensim,Michelle-Argus/ArribasimExtract,QuillLittlefeather/opensim-1,TomDataworks/opensim,OpenSimian/opensimulator,ft-/opensim-optimizations-wip-extras,BogusCurry/arribasim-dev,M-O-S-E-S/opensim,rryk/omp-server,RavenB/opensim,justinccdev/opensim,justinccdev/opensim,rryk/omp-server,bravelittlescientist/opensim-performance,ft-/opensim-optimizations-wip-tests,EriHoss/OpenSim_0.8.2.0_Dev_LibLSLCC,ft-/opensim-optimizations-wip,RavenB/opensim,QuillLittlefeather/opensim-1,ft-/arribasim-dev-extras,TomDataworks/opensim,M-O-S-E-S/opensim,bravelittlescientist/opensim-performance,Michelle-Argus/ArribasimExtract,justinccdev/opensim,RavenB/opensim,ft-/arribasim-dev-extras,ft-/opensim-optimizations-wip-tests,ft-/opensim-optimizations-wip-extras,rryk/omp-server,ft-/arribasim-dev-tests,bravelittlescientist/opensim-performance,BogusCurry/arribasim-dev,EriHoss/OpenSim_0.8.2.0_Dev_LibLSLCC,QuillLittlefeather/opensim-1,justinccdev/opensim,Michelle-Argus/ArribasimExtract,ft-/arribasim-dev-tests,justinccdev/opensim,OpenSimian/opensimulator,ft-/opensim-optimizations-wip-extras,bravelittlescientist/opensim-performance,ft-/arribasim-dev-extras,ft-/opensim-optimizations-wip-extras,BogusCurry/arribasim-dev,TomDataworks/opensim,ft-/arribasim-dev-extras,BogusCurry/arribasim-dev,justinccdev/opensim,BogusCurry/arribasim-dev,ft-/arribasim-dev-tests,OpenSimian/opensimulator,RavenB/opensim,M-O-S-E-S/opensim,RavenB/opensim,TomDataworks/opensim,ft-/opensim-optimizations-wip-tests,bravelittlescientist/opensim-performance,QuillLittlefeather/opensim-1,QuillLittlefeather/opensim-1,TomDataworks/opensim,ft-/opensim-optimizations-wip,ft-/arribasim-dev-tests,bravelittlescientist/opensim-performance,M-O-S-E-S/opensim,ft-/arribasim-dev-extras,EriHoss/OpenSim_0.8.2.0_Dev_LibLSLCC,EriHoss/OpenSim_0.8.2.0_Dev_LibLSLCC,TomDataworks/opensim,ft-/opensim-optimizations-wip,ft-/arribasim-dev-tests,OpenSimian/opensimulator