Update call to RcppArmadillo_fastLm_impl

- RcppArmadillo's underlying implementation of
  fastLm was renamed to fastLm_impl in
  RcppCore/RcppArmadillo#164 (mid-August 2017)
- Call the RcppAttributes generated C++
  function directly

Author: michaelweylandt

ChangeLog

@@ -1,3 +1,8 @@
+2018-05-30  Michael Weylandt  <michael.weylandt@gmail.com>
+
+	* inst/examples/lmBenchmark.R: Update call to RcppArmadillo's version
+	of fastLm in benchmark script
+
 2018-05-25  Ralf Stubner  <ralf.stubner@daqana.com>
 
 	* inst/include/RcppEigenWrap.h: Use Rf_xlength and R_xlen_t to

inst/examples/lmBenchmark.R

@@ -37,7 +37,7 @@ exprs$QR <- expression(.Call("RcppEigen_fastLm_Impl", mm, y, 1L, PACKAGE="RcppEi
 exprs$LLt <- expression(.Call("RcppEigen_fastLm_Impl", mm, y, 3L, PACKAGE="RcppEigen"))
 
 if (suppressMessages(require("RcppArmadillo", character=TRUE, quietly=TRUE))) {
-    exprs$arma <- expression(.Call("RcppArmadillo_fastLm", mm, y, PACKAGE="RcppArmadillo"))
+    exprs$arma <- expression(.Call("_RcppArmadillo_fastLm_impl", mm, y, PACKAGE="RcppArmadillo"))
 }
 
 if (suppressMessages(require("RcppGSL", character=TRUE, quietly=TRUE))) {