Task #7579: fix Backtrace in EXCEPTION_CLASS macro for APERTIF

LCS/Common/include/Common/Exception.h

@@ -188,7 +188,7 @@ namespace LOFAR
   public:							\
     excp(const std::string& text, const std::string& file="",	\
          int line=0, const std::string& function="",		\
-         Backtrace* bt=0) :					\
+         LOFAR::Backtrace* bt=0) :					\
       super(text, file, line, function, bt) {}			\
       virtual const std::string& type() const {			\
         static const std::string itsType(#excp);		\