When we have found a chunk of memory that is large enough and have computed

When we have found a chunk of memory that is large enough and have computed
a correctly aligned address in this block we really want to check, that the
part of the chunk that starts at the aligned address is large enough with
regard to the original request. Comparing it to 0 makes no sense, because this
is always true except in the rare case, that the aligned address is just at
the end of the chunk.

Approved by:	jake (mentor)