Fix a typo in previous commit: must call "putn" to print a crlf,

instead of "puts" which prints whatever is at %si, followed by a CRLF.

It was not noticed during tests because at that point %si points
to a partition entry whose first byte is 0x80, which is both a
terminator for the string and a non printable character.

Submitted by:	Christoph Mallon

sys/boot/i386/boot0/boot0.S

@@ -320,7 +320,7 @@ main.15:	movw $LOAD,%bx			# Address for read
 		cmpw $MAGIC,0x1fe(%bx)		# Bootable?
 		jne main.10			# No
 		pushw %si			# Save ptr to selected part.
-		callw puts			# Leave some space
+		callw putn			# Leave some space
 		popw %si			# Restore, next stage uses it
 		jmp *%bx			# Invoke bootstrap