EOL characters and multibyte encodings

I finally was able PL/R to compile and run on Windows recently. This has 
lead to people using a Windows based client (typically PgAdmin III) to 
create PL/R functions. Immediately I started to receive reports of 
failures that turned out to be due to the carriage return (\r) used in 
standard Win32 EOLs (\r\n). It seems that the R parser only accepts 
newlines (\n), even on Win32 (confirmed on r-devel list with a core 
developer).

My first thought on fixing this issue was to simply replace all 
instances of '\r' in pg_proc.prosrc with '\n' prior to sending it to the 
R parser. As far as I know, any instances of '\r' embedded in a 
syntactically valid R statement must be escaped (i.e. literally the 
characters "\" and "r"), so that should not be a problem. But I am 
concerned about how this potentially plays against multibyte characters. 
Is it safe to do this, or do I need to use a mb-aware replace algorithm?

Thanks,

Joe