Where are you getting your copy of “panda cvs” from? At head of CVS, the function call should be “Dtool_BorrowThisReference”, that is to say, it shouldn’t be spelled wrong. It is also on line 26 now, not line 30. It looks like this was corrected in the head in February, so your copy of the source would appear to be older than that, or at least, your copy of that FILE would appear to be older than that.
Could it be that you have a mix of different versions of code in your Panda tree? If so, try running a cvs update on your entire source tree, or try re-fetching the whole tree clean so you have something consistent to work with.
-lem