This patch removes a senseless if() clause in ramfs.

Reference: /n/sources/patch/applied/ramfs-senseless-if
Date: Fri Nov 18 20:04:17 CET 2005

--- /sys/src/cmd/ramfs.c	Fri Nov 18 20:03:57 2005
+++ /sys/src/cmd/ramfs.c	Fri Nov 18 20:03:50 2005
@@ -796,8 +796,6 @@
 				exits("");
 			error("mount read");
 		}
-		if(n < 0)
-			error("mount read");
 		if(n == 0)
 			continue;
 		if(convM2S(mdata, n, &thdr) == 0)