Make an int64->double conversion explicit to silence -Wconversion.
Make an int64->double conversion explicit to silence -Wconversion.

Addresses issue #173:
  https://code.google.com/p/googlemock/issues/detail?id=173

eugeneie/googletest,ychaim/googletest,astondbs/googletest,shawn-tian/googletest,eugeneie/googletest,flair/googletest,metacpp/googletest,vrqin/googletest,freyc/googletest,tristanjuricek/googletest,gupascal/googletest,nakdai/googletest,Ra1nWarden/googletest,LeslieW/googletest,xinguai/googletest,KartikAiyer/googletest,wingc-china/googletest,mcspring/googletest,RonaldinhoL/googletest,zhangjunpeng9354/googletest,jncornett/googletest,tanghong123/googletest,ronniebhatti/googletest,RonaldinhoL/googletest,mcspring/googletest,xinguai/googletest,stevenhwu/googletest,ronniebhatti/googletest,lutts/googletest,liwangmj/googletest,Whosemario/googletest,xinguai/googletest,Guigov1/googletest,cutepig123/googletest,Whosemario/googletest,hangshisitu/googletest,vrqin/googletest,KartikAiyer/googletest,micromouseonline/googletest,wingc-china/googletest,goodfella/googletest,GameCTO/googletest,hangshisitu/googletest,Ra1nWarden/googletest,cutepig123/googletest,gameplayer22/googletest,Dragnalith/googletest,astondbs/googletest,wingc-china/googletest,lutts/googletest,cutepig123/googletest,mcspring/googletest,nakdai/googletest,skyshaw/googletest,McWeda/googletest,LeslieW/googletest,JackWuHu/googletest,vrqin/googletest,TorosFanny/googletest,GameCTO/googletest,jncornett/googletest,zhangjunpeng9354/googletest,metacpp/googletest,abelx/googletest,goodfella/googletest,JackWuHu/googletest,flair/googletest,BastianClarenbach/googletest,skyshaw/googletest,nakdai/googletest,rnavarro-gpsw/googletest,Dragnalith/googletest,austgl/googletest,tristanjuricek/googletest,micromouseonline/googletest,BastianClarenbach/googletest,flair/googletest,micromouseonline/googletest,tanghong123/googletest,JackWuHu/googletest,TorosFanny/googletest,Dragnalith/googletest,wangjia3015/googletest,stevenhwu/googletest,zhangjunpeng9354/googletest,McWeda/googletest,shawn-tian/googletest,lutts/googletest,metacpp/googletest,ristvan/googletest,liwangmj/googletest,ronniebhatti/googletest,BastianClarenbach/googletest,goodfella/googletest,skyshaw/googletest,tanghong123/googletest,RonaldinhoL/googletest,rnavarro-gpsw/googletest,shawn-tian/googletest,freyc/googletest,gameplayer22/googletest,freyc/googletest,austgl/googletest,wangjia3015/googletest,abelx/googletest,GameCTO/googletest,ristvan/googletest,rnavarro-gpsw/googletest,Whosemario/googletest,hangshisitu/googletest,Guigov1/googletest,wangjia3015/googletest,gupascal/googletest,gameplayer22/googletest,KartikAiyer/googletest,Ra1nWarden/googletest,austgl/googletest,gupascal/googletest,abelx/googletest,stevenhwu/googletest,TorosFanny/googletest,jncornett/googletest,LeslieW/googletest,ychaim/googletest,ychaim/googletest,tristanjuricek/googletest,liwangmj/googletest,eugeneie/googletest,Guigov1/googletest,McWeda/googletest,astondbs/googletest,ristvan/googletest