dwarf2out.c (dbx_reg_number): Check return value from LEAF_REG_REMAP and only use it if it is valid.

* dwarf2out.c (dbx_reg_number): Check return value from
  LEAF_REG_REMAP and only use it if it is valid.
  (multiple_reg_loc_descriptor): Likewise.

From-SVN: r113756