Update cava.c
Update cava.c

fixed a bug where default input method was undifened.
anko/cava,nrhine1/cava,nikp123/cava,karlstav/cava,jubalh/cava,nikp123/cava,Suninus/cava,Suninus/cava,jubalh/cava,phijor/cava,anko/cava,nrhine1/cava,phijor/cava,karlstav/cava