parsers: drop spurious check of readlen value
We're about to check if len < 40 after assigning readlen to len, which
means that if len < 40 we'll still abort, but I'm about to add a
sensible exception to that failure, so let's just discard this useless
check.
--- a/mercurial/parsers.c Tue Aug 18 16:32:41 2015 -0400
+++ b/mercurial/parsers.c Tue Aug 18 16:39:26 2015 -0400
@@ -478,9 +478,6 @@
&str, &readlen))
goto quit;
- if (readlen < 0)
- goto quit;
-
len = readlen;
/* read parents */