Check to make sure not just in C, to avoid errors

Author: aure

Sources/CAudioKitEX/include/AtomicDataPtr.h

@@ -3,6 +3,8 @@
 #ifndef AtomicData_hpp
 #define AtomicData_hpp
 
+#ifdef __cplusplus
+
 #include <atomic>
 #include <memory>
 #include <vector>
@@ -80,4 +82,6 @@ class AtomicDataPtr {
     }
 };
 
+#endif // __cplusplus
+
 #endif /* AtomicData_hpp */