fix compile warnings

Reference: /n/sources/patch/applied/mpcrttest
Date: Fri Sep  4 04:11:01 CES 2009
Signed-off-by: quanstro@quanstro.net

--- /sys/src/libmp/port/crttest.c	Fri Sep  4 04:10:42 2009
+++ /sys/src/libmp/port/crttest.c	Fri Sep  4 04:10:41 2009
@@ -8,7 +8,6 @@
 	CRTpre *crt;
 	CRTres *res;
 	mpint *m, *x, *y;
-	int i;
 
 	fmtinstall('B', mpfmt);
 
@@ -49,6 +48,6 @@
 		mpfree(p[0]);
 		mpfree(p[1]);
 	}
-	print("%d secs with more\n", time(0)-start);
+	print("%ld secs with more\n", time(0)-start);
 	exits(0);
 }