userphrase-hash: avoid double free in TerminateUserphrase
userphrase-hash: avoid double free in TerminateUserphrase

cwlin/libchewing,cwlin/libchewing,chewing/libchewing,cwlin/libchewing,hiunnhue/libchewing,hiunnhue/libchewing,yan12125/libchewing,chewing/libchewing,chewing/libchewing,yan12125/libchewing,cwlin/libchewing,hiunnhue/libchewing,chewing/libchewing,yan12125/libchewing,yan12125/libchewing,cwlin/libchewing,hiunnhue/libchewing,hiunnhue/libchewing