[OctDev] Patch for awgn.m and further errors with 'make check'

[Thomas W. <tho...@gm...>]

Hi, 

there's a bracket missing in awgn.m. Strangely enough, 
	make check 
fails with Octave 2.9.5 without it.

But even with it, it fails with the following error:
=======================================================================
extra/testfun [tests 3 of 7 files]
warning: warning: setting state with structure not implemented
warning: warning: setting state with structure not implemented
error: regexp: missing terminating ] for character class at position 57
of expression
error: evaluating argument list element number 1
error: if: error evaluating conditional expression
error: evaluating if command near line 628, column 11
error: evaluating if command near line 604, column 7
error: evaluating if command near line 491, column 5
error: evaluating for command near line 461, column 3
error: called from `test' in file
`/tmp/octave-forge-2006.03.17/extra/testfun/test.m'
error: near line 373 of file `fntests.m'

make: *** [check] Error 1
=======================================================================

This means it fails with 
	[p,n] = test('extra/testfun/assert.m','quiet',fid);

However, if I start Octave myself and run the tests in assert.m,
everything works. In case it's important, I have compiled both Octave
and Octave-Forge with pcre support.

	Thomas