Fix for sparse binding, when unbinding a page.
Fix for sparse binding, when unbinding a page.

pmuetschard/gapid,Qining/gapid,Qining/gapid,pmuetschard/gapid,google/agi,google/agi,google/gapid,google/agi,Qining/gapid,google/agi,Qining/gapid,google/agi,google/gapid,pmuetschard/gapid,Qining/gapid,pmuetschard/gapid,google/agi,google/gapid,pmuetschard/gapid,google/gapid,Qining/gapid,google/agi,google/gapid,pmuetschard/gapid,google/gapid,google/gapid,google/gapid,pmuetschard/gapid,Qining/gapid,Qining/gapid,google/agi,pmuetschard/gapid