dec: validate colorspace before using as array index
dec: validate colorspace before using as array index

Change-Id: I5bcf01769d58d39a5f8d50f54cf0cd83a2309602

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