enable posix shared memory on non-Win32 platforms (Linux and Mac) for example browser

examples/SharedMemory/PosixSharedMemory.cpp

@@ -2,10 +2,10 @@
 #include "Bullet3Common/b3Logging.h"
 #include "LinearMath/btScalar.h" //for btAssert
 
-#ifdef __APPLE__
+//haven't implemented shared memory on Windows yet, just Linux and Mac
+#ifndef _WIN32
 #define TEST_SHARED_MEMORY
-
-#endif
+#endif//_WIN32
 
 #include <stddef.h>
 
@@ -83,4 +83,4 @@ void PosixSharedMemory::releaseSharedMemory(int key, int size)
         }
     }
 #endif
-}
+}