Make all of the rest of the code base be conditionally compiled.

DMRNetwork.cpp

@@ -17,10 +17,11 @@
  */
 
 #include "DMRNetwork.h"
-
 #include "Utils.h"
 #include "Log.h"
 
+#if defined(USE_DMR)
+
 #include <cstdio>
 #include <cassert>
 #include <cstring>
@@ -444,3 +445,6 @@ bool CDMRNetwork::write(const unsigned char* data, unsigned int length)
 
 	return true;
 }
+
+#endif
+