correct check that all constructors are private for "Class with only 'private' constructors should be declared 'final'" inspection

plugins/InspectionGadgets/InspectionGadgetsAnalysis/src/com/siyeh/ig/classlayout/ClassWithOnlyPrivateConstructorsInspectionBase.java

@@ -62,7 +62,7 @@ public class ClassWithOnlyPrivateConstructorsInspectionBase extends BaseInspecti
         return;
       }
       for (PsiMethod constructor : constructors) {
-        if (constructor.hasModifierProperty(PsiModifier.FINAL)) {
+        if (!constructor.hasModifierProperty(PsiModifier.PRIVATE)) {
           return;
         }
       }

plugins/InspectionGadgets/testsrc/com/siyeh/ig/classlayout/ClassWithOnlyPrivateConstructorsInspectionTest.java

@@ -49,6 +49,12 @@ public class ClassWithOnlyPrivateConstructorsInspectionTest extends LightInspect
            "}");
   }
 
+  public void testPublicConstructor() {
+    doTest("class A {" +
+           "  public A() {}" +
+           "}");
+  }
+
   @Nullable
   @Override
   protected InspectionProfileEntry getInspection() {