fixfmt: fix a print in regress/float.c

Signed-off-by: Ronald G. Minnich <rminnich@gmail.com>

sys/src/regress/float.c

@@ -46,9 +46,9 @@ main(void)
 		exits("FAIL");
 	}
 
-	print("Double-precision test number: %s\n", DPRECSTR);
-	print("Expected internal representation: %ullx\n", dieee);
-	print("Actual internal representation: %ullx\n", q);
+	fprint(2, "Double-precision test number: %s\n", DPRECSTR);
+	fprint(2, "Expected internal representation: %llx\n", dieee);
+	fprint(2, "Actual internal representation: %llx\n", q);
 
 	if(q != dieee)
 		exits("FAIL");