fix orig_rect==NULL case
fix orig_rect==NULL case

Change-Id: I3bb4fbebf59cba2a67681e74530fc0fe51f1958f

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