devssl.c frees a Block (in an error handler) using free not freeb.

Reference: /n/sources/patch/applied/ssl-freeb
Date: Fri Oct  7 20:51:58 CES 2011
Signed-off-by: forsyth@terzarima.net

--- /sys/src/9/port/devssl.c	Fri Oct  7 20:51:27 2011
+++ /sys/src/9/port/devssl.c	Fri Oct  7 20:51:23 2011
@@ -760,7 +760,7 @@
 
 	if(waserror()){
 		if(b != nil)
-			free(b);
+			freeb(b);
 		nexterror();
 	}