Fix ctype() error detection
Fix ctype() error detection

The error detection inserted in cdbda61 only works if there is
no fallthrough between cases

8l/scc,k0gaMSX/scc,k0gaMSX/scc,k0gaMSX/kcc,k0gaMSX/kcc,8l/scc,k0gaMSX/scc,8l/scc