Re: Yet another ecoff fuzzed object fix

In commit 6fc018e9e593 I replaced the fdr_ptr csym check against the
header isymMax count with a check against bfd symcount.  In fact, both
checks are needed.  The isymMax check sanity checks accesses against
the external sym array, the symcount one against the internal array.

	* ecoff.c (_bfd_ecoff_slurp_symbol_table): Reinstate fdr_ptr
	csym check against isymMax.