Issue with RADIATE in beam not triggering for protons

[fsoubelet]

Hi,

As discussed saturday night in the CCC, I'm quite convinced there is an issue with the RADIATE flag of the beam when not using electrons / leptons.

An easy way to reproduce:

• Run the test/test_emit/test-emit.madx and confirm beam attributes are changed, a U0 is calculated etc.
• Run the same file by simply changing electron for proton in the beam command, and observe nothing happens when EMIT is called.

This is the simplest reproduction I could come up with. Worth noting that one can also, say put an electron in the LHC (injection optics, bring down beam->pc to maybe 5 though) and see that it works, but similarly for a proton beam nothing triggers.

No idea where the problem lies in the code however.