Fix a link error when building the sample apps. (#5)

src/dec_handle.h

@@ -28,7 +28,7 @@ THE SOFTWARE.
 
 struct DecHandle {
 
-    explicit DecHandle();   //constructor
+    explicit DecHandle() {};   //constructor
     ~DecHandle() { clear_errors(); }
     std::shared_ptr<RocDecoder> roc_decoder;    // class instantiation
     bool no_error() { return error.empty(); }