Use gcc -ansi -pedantic in 9c.  Fix many non-C89-isms.
diff --git a/src/lib9/errstr.c b/src/lib9/errstr.c
index af989f4..caf7153 100644
--- a/src/lib9/errstr.c
+++ b/src/lib9/errstr.c
@@ -12,7 +12,7 @@
 
 enum
 {
-	EPLAN9 = 0x19283745,
+	EPLAN9 = 0x19283745
 };
 
 char *(*_syserrstr)(void);