Fix issue #13

Author: Eugene Simonov

pkg/analyzer/occurrences.go

@@ -187,6 +187,8 @@ func (nom namedOccurrenceMap) addFromCondition(stmt *ast.IfStmt) {
 	case *ast.BinaryExpr:
 		for _, v := range [2]ast.Expr{v.X, v.Y} {
 			switch e := v.(type) {
+			case *ast.CallExpr:
+				nom.addFromCallExpr(stmt.If, e)
 			case *ast.Ident:
 				nom.addFromIdent(stmt.If, e)
 			case *ast.SelectorExpr:

testdata/testdata.go

@@ -49,6 +49,12 @@ func notUsed_CondIdent_NotOK() {
 	}
 }
 
+func notUsed_CondCallWithIndentExpr_NotOK() {
+	v := getInt() // want "variable '.+' is only used in the if-statement"
+	if int(v) != 2 {
+	}
+}
+
 func notUsed_Body_NotOK() {
 	v := getValue() // want "variable '.+' is only used in the if-statement"
 	if true {