PR 33385 DST handling

PR 33385 DST handling

Commit 816995444667, a fix for a fuzzer testcase resulting in a buffer
overflow, broke reading of DST.  DST is a special case where a first
pass over the section just sizes it.
Commit a3c0896d80d2, another buffer overflow fix, wrongly removed a
line incrementing DST record length.

	* vms-alpha.c (image_write): Don't do bounds check for
	sections in memory without contents.
	(evax_bfd_print_dst): Add one to length.