more memory errors (valgrind)

src/cmd/rc/code.c

@@ -26,6 +26,7 @@ morecode(void)
 	if(codebuf==0)
 		panic("Can't realloc %d bytes in morecode!",
 				ncode*sizeof codebuf[0]);
+	memset(codebuf+ncode-100, 0, 100*sizeof codebuf[0]);
 	return 0;
 }
 

src/cmd/rc/io.c

@@ -37,7 +37,7 @@ pfmt(io *f, char *fmt, ...)
 			pwrd(f, va_arg(ap, char *));
 			break;
 		case 'r':
-			errstr(err, sizeof err); pstr(f, err);
+			rerrstr(err, sizeof err); pstr(f, err);
 			break;
 		case 's':
 			pstr(f, va_arg(ap, char *));

src/cmd/rc/subr.c

@@ -10,6 +10,7 @@ emalloc(long n)
 	if(p==0)
 		panic("Can't malloc %d bytes", n);
 /*	if(err){ pfmt(err, "malloc %d->%p\n", n, p); flush(err); } /**/
+	memset(p, 0, n);
 	return p;
 }