fix double to float conversion warning
fix double to float conversion warning

introduced in:
 a792b91 fix the -g/O3 discrepancy for 32bit compile

Change-Id: Ic77d6170a5a91cf58ec10c68656ac61a7c0ee41d

zofuthan/libwebp,Suvarna1488/webm.libwebp,kleopatra999/webm.libwebp,reimaginemedia/webm.libwebp,iniwf/webm.libwebp,kalli123/webm.libwebp,dumganhar/libwebp,Tekserve/libwebp,PKRoma/libwebp,comoyo/gonzo-libwebp,kim42083/webm.libwebp,appunite/libwebp,cysp/libwebp,kim42083/webm.libwebp,jiehu5114/libwebp,webmproject/libwebp,Aexyn/libwebp,matanbs/webm.libwebp,ya7lelkom/libwebp,abwiz0086/webm.libwebp,kim42083/webm.libwebp,yohunl/libwebp,Aexyn/libwebp,matanbs/webm.libwebp,webmproject/libwebp,reimaginemedia/webm.libwebp,Tekserve/libwebp,redengineer/libwebp,kleopatra999/webm.libwebp,rxl194/libwebp,yohunl/libwebp,Tekserve/libwebp,altogother/webm.libwebp,Maria1099/webm.libwebp,jiehu5114/libwebp,kalli123/webm.libwebp,PKRoma/libwebp,kleopatra999/webm.libwebp,dumganhar/libwebp,appunite/libwebp,ya7lelkom/libwebp,gshORTON/webm.libwebp,kalli123/webm.libwebp,kim42083/webm.libwebp,ericmckean/webm.libwebp,rxl194/libwebp,ya7lelkom/libwebp,abwiz0086/webm.libwebp,Acidburn0zzz/webm.libwebp,abwiz0086/webm.libwebp,keane83/BLE_IM,Acidburn0zzz/webm.libwebp,ttyangf/libwebp,keane83/BLE_IM,altogother/webm.libwebp,appunite/libwebp,Acidburn0zzz/webm.libwebp,PKRoma/libwebp,abwiz0086/webm.libwebp,ttyangf/libwebp,jacklicn/libwebp,kleopatra999/webm.libwebp,comoyo/gonzo-libwebp,rxl194/libwebp,Suvarna1488/webm.libwebp,ttyangf/libwebp,matanbs/webm.libwebp,reimaginemedia/webm.libwebp,jacklicn/libwebp,Suvarna1488/webm.libwebp,Suvarna1488/webm.libwebp,imazen/libwebp,appunite/libwebp,altogother/webm.libwebp,redengineer/libwebp,matanbs/webm.libwebp,abwiz0086/webm.libwebp,matanbs/webm.libwebp,comoyo/gonzo-libwebp,jiehu5114/libwebp,cysp/libwebp,cysp/libwebp,iniwf/webm.libwebp,ericmckean/webm.libwebp,jiehu5114/libwebp,yohunl/libwebp,zofuthan/libwebp,Distrotech/libwebp,Aexyn/libwebp,rxl194/libwebp,imazen/libwebp,altogother/webm.libwebp,ya7lelkom/libwebp,PKRoma/libwebp,gshORTON/webm.libwebp,Acidburn0zzz/webm.libwebp,jacklicn/libwebp,Distrotech/libwebp,appunite/libwebp,cysp/libwebp,jiehu5114/libwebp,kleopatra999/webm.libwebp,Aexyn/libwebp,keane83/BLE_IM,rxl194/libwebp,jacklicn/libwebp,iniwf/webm.libwebp,Acidburn0zzz/webm.libwebp,altogother/webm.libwebp,Distrotech/libwebp,imazen/libwebp,yohunl/libwebp,Suvarna1488/webm.libwebp,zofuthan/libwebp,ericmckean/webm.libwebp,Aexyn/libwebp,comoyo/gonzo-libwebp,redengineer/libwebp,ericmckean/webm.libwebp,reimaginemedia/webm.libwebp,iniwf/webm.libwebp,redengineer/libwebp,Maria1099/webm.libwebp,ya7lelkom/libwebp,keane83/BLE_IM,zofuthan/libwebp,ericmckean/webm.libwebp,imazen/libwebp,keane83/BLE_IM,Maria1099/webm.libwebp,gshORTON/webm.libwebp,Maria1099/webm.libwebp,kim42083/webm.libwebp,comoyo/gonzo-libwebp,gshORTON/webm.libwebp,PKRoma/libwebp,comoyo/gonzo-libwebp,webmproject/libwebp,ttyangf/libwebp,PKRoma/libwebp,gshORTON/webm.libwebp,webmproject/libwebp,zofuthan/libwebp,imazen/libwebp,kalli123/webm.libwebp,kalli123/webm.libwebp,reimaginemedia/webm.libwebp,ttyangf/libwebp,iniwf/webm.libwebp,dumganhar/libwebp,redengineer/libwebp,yohunl/libwebp,jacklicn/libwebp,Tekserve/libwebp,webmproject/libwebp,Maria1099/webm.libwebp,comoyo/gonzo-libwebp,appunite/libwebp