Insert program listing: all code ends up on one line

[Nikos Chantziaras]

I'm on LyX 2.0 beta1.

I wanted to include a *.c file in my document.  There doesn't seem to be 
a way to do that, so I just copy&pasted the C code inside a "program 
listing" box (Insert->Program Listing).

However, copy&pasting results in all code being put in one line.  For 
example, this:

        steps = 0;
        while (1. + atom_d > 1.) {
                atom_d /= 2.;
                ++steps;
        }

ends up as:

steps = 0;      while (1. + atom_d > 1.) {           atom_d /= 2.;           
++steps;        }


in LyX (and in the rendered PDF.)  So I have two questions at this 
point:  How do I copy&paste correctly, and is there a way to not 
copy&paste at all and use an external *.c file?