* dbxread.c (read_dbx_symntab): Avoid coredump on malformed file.
* printcmd.c (print_formatted): Flush output before disassembly.
* xm-mips.h: Update KERNEL_U_ADDR for new scheme. Cleanup a bit.
Pass .reg virtual memory address to fetch_core_registers to help
it find the registers in the core-file header.
* coredep.c (fetch_core_registers): Take new argument, use it,
and pass it to register_addr to locate the block of registers.
