Merge r14208 from BUF_REMOVAL branch to trunk.
In function read_dot_valgrindrc use a large enough buffer 
allocated on the stack. 
Also assert that the passed in directory is not NULL. This is 
true at all call sites. The old code would have attempted to read
/.valgrindrc for dir == NULL and I don't think we want that.


git-svn-id: svn://svn.valgrind.org/valgrind/trunk@14580 a5019735-40e9-0310-863c-91ae7b9d1cf9
Merge r14209 from BUF_REMOVAL branch to trunk.
In VG_(redir_notify_new_DebugInfo) use a large enough buffer
allocated on the stack.


git-svn-id: svn://svn.valgrind.org/valgrind/trunk@14581 a5019735-40e9-0310-863c-91ae7b9d1cf9