minor, set under test variable to null after delete in the teardown method.

Author: mattheweshleman

cpputest-for-freertos-lib/tests/cpputest_for_freertos_mutex_tests.cpp

@@ -40,6 +40,7 @@ TEST_GROUP(MutexTests)
         if (mMutexUnderTest != nullptr)
         {
             vSemaphoreDelete(mMutexUnderTest);
+            mMutexUnderTest = nullptr;
         }
     }
 

cpputest-for-freertos-lib/tests/cpputest_for_freertos_queue_tests.cpp

@@ -44,6 +44,7 @@ TEST_GROUP(QueueTests)
         {
             //needed for cpputest memory leak detection
             vQueueDelete(mQueueUnderTest);
+            mQueueUnderTest = nullptr;
         }
     }
 

cpputest-for-freertos-lib/tests/cpputest_for_freertos_semaphore_tests.cpp

@@ -38,6 +38,7 @@ TEST_GROUP(SemaphoreTests)
         if (mSemaUnderTest != nullptr)
         {
             vSemaphoreDelete(mSemaUnderTest);
+            mSemaUnderTest = nullptr;
         }
     }