Fix condition for whether to add path anchor.
Fix condition for whether to add path anchor.

If it’s not binary, definitely add path anchor.
Otherwise, add the anchor if it is a directory.
i.e. not is_binary OR is_dir.
gartung/dxr,pombredanne/dxr,pelmers/dxr,jay-z007/dxr,jay-z007/dxr,jbradberry/dxr,bozzmob/dxr,pelmers/dxr,kleintom/dxr,jbradberry/dxr,pombredanne/dxr,gartung/dxr,jbradberry/dxr,kleintom/dxr,gartung/dxr,jbradberry/dxr,kleintom/dxr,jay-z007/dxr,jbradberry/dxr,gartung/dxr,pelmers/dxr,bozzmob/dxr,bozzmob/dxr,kleintom/dxr,pombredanne/dxr,jbradberry/dxr,pelmers/dxr,pelmers/dxr,gartung/dxr,kleintom/dxr,bozzmob/dxr,jay-z007/dxr,pelmers/dxr,bozzmob/dxr,bozzmob/dxr,kleintom/dxr,pombredanne/dxr,bozzmob/dxr,gartung/dxr,jay-z007/dxr,jay-z007/dxr,gartung/dxr,pombredanne/dxr,jbradberry/dxr,jay-z007/dxr,pelmers/dxr,pombredanne/dxr,kleintom/dxr,pombredanne/dxr