re-define Rf_error to behave as 'Rcpp::stop()'

Author: kevinushey

inst/include/RcppCommon.h

@@ -28,6 +28,9 @@
 
 #include <Rcpp/r/headers.h>
 
+// Override 'Rf_error' so that we can catch errors
+#define Rf_error Rcpp::stop
+
 /**
  * \brief Rcpp API
  */