Fixed #6327 (Unwanted constStatement on (void)0)

lib/checkother.cpp

@@ -1717,6 +1717,10 @@ void CheckOther::checkIncompleteStatement()
             if (Token::Match(tok->next(), "%num% [,.]"))
                 continue;
 
+            // No warning for [;{}] 0 ;
+            if (Token::Match(tok, "[;{}] 0 ;"))
+                continue;
+
             // bailout if there is a "? :" in this statement
             bool bailout = false;
             for (const Token *tok2 = tok->tokAt(2); tok2; tok2 = tok2->next()) {

test/testincompletestatement.cpp

@@ -61,6 +61,7 @@ private:
         TEST_CASE(test5);
         TEST_CASE(test6);
         TEST_CASE(test_numeric);
+        TEST_CASE(void0); // #6327: No fp for statement "(void)0;"
         TEST_CASE(intarray);
         TEST_CASE(structarraynull);
         TEST_CASE(structarray);
@@ -150,6 +151,11 @@ private:
         ASSERT_EQUALS("", errout.str());
     }
 
+    void void0() { // #6327
+        check("void f() { 0; }");
+        ASSERT_EQUALS("", errout.str());
+    }
+
     void intarray() {
         check("int arr[] = { 100/2, 1*100 };");
         ASSERT_EQUALS("", errout.str());