fix: False positive when multiplying with int type struct field

go.mod

@@ -11,7 +11,7 @@ require (
 	github.com/ashanbrown/makezero v0.0.0-20201205152432-7b7cdbb3025a
 	github.com/bkielbasa/cyclop v1.2.0
 	github.com/bombsimon/wsl/v3 v3.1.0
-	github.com/charithe/durationcheck v0.0.3
+	github.com/charithe/durationcheck v0.0.4
 	github.com/daixiang0/gci v0.2.8
 	github.com/denis-tingajkin/go-header v0.4.2
 	github.com/esimonov/ifshort v1.0.1

test/testdata/durationcheck.go

@@ -1,9 +1,32 @@
 //args: -Edurationcheck
 package testdata
 
-import "time"
+import (
+	"fmt"
+	"time"
+)
 
-func waitFor(someDuration time.Duration) {
+type s struct {
+	d int
+}
+
+func durationcheckCase01() {
+	ss := s{10}
+	_ = time.Duration(ss.d) * time.Second
+}
+
+func durationcheckCase02() {
+	seconds := 10
+	fmt.Print(time.Duration(seconds) * time.Second)
+}
+
+func durationcheckCase03(someDuration time.Duration) {
+	timeToWait := someDuration * time.Second // ERROR "Multiplication of durations: `someDuration \\* time.Second` "
+	time.Sleep(timeToWait)
+}
+
+func durationcheckCase04() {
+	someDuration := 2 * time.Second
 	timeToWait := someDuration * time.Second // ERROR "Multiplication of durations: `someDuration \\* time.Second` "
 	time.Sleep(timeToWait)
 }