Warning fixes:
* Makefile.in (cvt.o): Depend on toplev.h.
* cp-tree.h (check_template_shadow, pod_type_p): Add prototypes.
* cvt.c: Include toplev.h.
* except.c (get_eh_caught, get_eh_handlers): Hide prototypes and
definitions.
* init.c (expand_vec_init): Initialize variable `itype'.
* lex.c (yyerror): Cast the argument passed to a ctype function to
an unsigned char.
* method.c (build_mangled_C9x_name): Wrap prototype and definition
in "HOST_BITS_PER_WIDE_INT >= 64".
* typeck.c (build_binary_op): Mark parameter `convert_p' with
ATTRIBUTE_UNUSED.
From-SVN: r24395