use uint8_t for inv_palette[]
use uint8_t for inv_palette[]

Change-Id: I5005ce68d89bfb657d46ad8acc4368c29fa0c4fd

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