Make double comment block start trigger a warning?

Hi,

I just spent hours figuring why my CSS didn't work. Browsers seemed to 
skip a block of code.

OK, I usually comment my CSS in the following way:

/* Product table start /*
table.products tr:first-child td { text-align: center; }
/* Product table end */

Of course, most of you saw the error: the first comment actually ends 
only at the end of the second comment! Since I didn't (for some reason I 
do not understand) edit my CSS using Notepad++, which gives code fancy 
colors, I beautifully missed my fatal typo. No wonder CSS Validator 
skipped that block, too!

So, my kind request is that two comment block starts "in a row" would 
trigger a visible warning.
Thank You.
--
Matti Viljanen, Finland
matti.viljanen@wippies.com