disable unnecessary parentheses intention when it is not applicable

plugins/IntentionPowerPak/src/com/siyeh/ipp/psiutils/ParenthesesUtils.java

@@ -455,8 +455,7 @@ public class ParenthesesUtils {
           return true;
         }
       }
-      return false;
     }
-    return parentPrecedence != childPrecedence;
+    return parentPrecedence < childPrecedence;
   }
 }

plugins/IntentionPowerPak/test/com/siyeh/ipp/parentheses/SimplePrecedence.java

@@ -0,0 +1,11 @@
+package com.siyeh.ipp.parentheses;
+class Inversion {
+  public void context(boolean a, boolean b, boolean c) {
+    if ((!a || <caret>!b) && !c) {
+      System.out.println(1);
+    }
+    else {
+      System.out.println(0);
+    }
+  }
+}

plugins/IntentionPowerPak/testSrc/com/siyeh/ipp/parenthesis/UnnecessaryParenthesesIntentionTest.java

@@ -17,6 +17,7 @@ public class UnnecessaryParenthesesIntentionTest extends IPPTestCase {
   public void testNotCommutative2() { doTest(); }
   public void testArrayInitializer() { doTest(); }
   public void testArrayAccessExpression() { doTest(); }
+  public void testSimplePrecedence() { assertIntentionNotAvailable(); }
 
   @Override
   protected String getRelativePath() {