Fix for Parallax_FS.glsl (in the SwizzledParallax example) for Mac

I ran into some problems with the Mac version of SwizzledParallax demo (T12_GLSL_Parallax) and found a fix.

Line 34 of the shader contains a comment that seems to interfere with parsing and compilation. For me the comment shows up as "z = sqrt(1-x≤-y≤)", although I'm sure the intended rendering is a superscript 2, for squaring.

When I run the program the following is logged:

Vertex Shader compiled without complaint.
Fragment Shader failed!
Log:
ERROR: 0:57: 'premature EOF' : syntax error syntax error

If these invalid characters are removed from the comment, the example works as intended.
I changed the line to:

 normal.z = sqrt( 1.0 - normal.x*normal.x - normal.y*normal.y ); // z = sqrt(1-x*x-y*y)

Additional fun and probably unnecessary facts:
OpenTK version is a nightly build from: 2012-03-15
I'm running OS X 10.7.4: Darwin Rivest.local 11.4.0 Darwin Kernel Version 11.4.0: Mon Apr 9 19:33:05 PDT 2012; root:xnu-1699.26.8~1/RELEASE_I386 i386
Mono version: Mono JIT compiler version 2.10.9 (tarball Mon May 7 20:25:51 EDT 2012)