use waypt_new instead of explict xcalloc - see message to -code about this.

use waypt_new instead of explict xcalloc - see message to -code about this.
Add explict casts on allocators.
gpsutil: add test for unknown alt on output.
jeeps: don't use 'true' in unused (sigh) code.
i65.anr.gpx, reference/netstumbler.mps: regenerate for alt change.

git-svn-id: http://gpsbabel.googlecode.com/svn/trunk@834 f51c46e8-681c-474f-0cfe-069cfd0219fb