reflectx: fixes to items reported by megacheck

reflectx/reflect.go

@@ -269,9 +269,7 @@ type typeQueue struct {
 // A copying append that creates a new slice each time.
 func apnd(is []int, i int) []int {
 	x := make([]int, len(is)+1)
-	for p, n := range is {
-		x[p] = n
-	}
+	copy(x, is)
 	x[len(x)-1] = i
 	return x
 }

reflectx/reflect_test.go

@@ -603,7 +603,6 @@ func TestMapperMethodsByName(t *testing.T) {
 		A0 *B `db:"A0"`
 		B  `db:"A1"`
 		A2 int
-		a3 int
 	}
 
 	val := &A{
@@ -811,8 +810,6 @@ func TestMustBe(t *testing.T) {
 				t.Error("expected panic with *reflect.ValueError")
 				return
 			}
-			if valueErr.Method != "github.com/jmoiron/sqlx/reflectx.TestMustBe" {
-			}
 			if valueErr.Kind != reflect.String {
 				t.Errorf("unexpected Kind: %s", valueErr.Kind)
 			}