Fixed incorrect parameters for memory deallocation

tests/programs/memory-free.q

@@ -0,0 +1,7 @@
+import mem
+
+main() {
+	address := mem.alloc(1024)
+	err := mem.free(address, 1024)
+	assert err == 0
+}

tests/programs_test.go

@@ -59,6 +59,7 @@ var programs = []struct {
 	{"switch", "", "", 0},
 	{"loop", "", "", 0},
 	{"loop-lifetime", "", "", 0},
+	{"memory-free", "", "", 0},
 	{"out-of-memory", "", "", 0},
 	{"struct", "", "", 0},
 }