i#3444 uninit memory: correctly 0-terminate 'dst' in memquery_library_bounds_by_iterator (#3445)
i#3444 uninit memory: correctly 0-terminate 'dst' in memquery_library_bounds_by_iterator (#3445)

Previously we must have been getting lucky most of the time. I suspect
this would fix any range of low-frequency bugs which are triggered by
incorrect memory bounds discovery (e.g. hang on static detach, or
debug-level complaints about memory bound mismatches).

Fixes #3444

AmesianX/dynamorio,AmesianX/dynamorio,AmesianX/dynamorio,AmesianX/dynamorio,AmesianX/dynamorio