I do not think that the previous comment was intended as criticism. Instead I think that he was trying to point out that overall this forum has been rather US centric, and that the vast majority who post here may not have much knowledge of how things are done elsewhere (this includes me).
I can tell you that the common perception among most students applying to US law schools is that the lack of any particular coursework as an undergrad (assuming that one was granted a degree) is unlikely to be a bar to admission at a law school. It seems that the biggest factors for the admissions are a students GPA and LSAT, with other lesser factors providing some adjustments at the margins (maybe some adjustment for work experience, perhaps if one graduates from a particular noted school, and so on....)
Having a single C is unlikely to cause any real problems. Once again the common wisdom seems to be that the concern is more about overall GPA then performance in specific courses. I suspect that this is because the type of coursework performed by those requesting admissions into law school varies much more then that of those perusing other professional programs such as medical school where everything will have taken some many course in Biology, Chemistry, (the dreaded Organic Chem course...).
Although I have to admit that I am not sure how well this plays outside the US, but I would not be surprised if the process is similar.