Weird mex file contents in Yalmip

[fork]

in findhashsorted.c, there is the following line: 

"#  mexPrintf("What!! %i",mid);"

There is also a line: 

"# No way, the number is smaller than lowest number in table"

So here is my question:  Does ML scrub hash comments out of mex files, is this
some preprocessor magic, or ... does no one test their code before releasing it
???(I know ML doesn't have the cool %!test syntax of Octave, but still....)

Tx
F