Windows: Ensure that memory mapped files behave the same on all targets by allowing other code to open the memory mapped file with write priveleges even if the map was created with read priveleges only

modules/juce_core/native/juce_win32_Files.cpp

@@ -360,7 +360,7 @@ void MemoryMappedFile::openInternal (const File& file, AccessMode mode, bool exc
     }
 
     HANDLE h = CreateFile (file.getFullPathName().toWideCharPointer(), accessMode,
-                           exclusive ? 0 : (FILE_SHARE_READ | (mode == readWrite ? FILE_SHARE_WRITE : 0)), 0,
+                           exclusive ? 0 : FILE_SHARE_WRITE, 0,
                            createType, FILE_ATTRIBUTE_NORMAL | FILE_FLAG_SEQUENTIAL_SCAN, 0);
 
     if (h != INVALID_HANDLE_VALUE)