ArrayBase: Avoid undefined behaviour when trying to copy a range of 0 elements

modules/juce_core/containers/juce_ArrayBase.h

@@ -402,7 +402,8 @@ private:
     template <typename T = ElementType>
     TriviallyCopyableVoid<T> addArrayInternal (const ElementType* otherElements, int numElements)
     {
-        memcpy (elements + numUsed, otherElements, (size_t) numElements * sizeof (ElementType));
+        if (numElements > 0)
+            memcpy (elements + numUsed, otherElements, (size_t) numElements * sizeof (ElementType));
     }
 
     template <typename Type, typename T = ElementType>