Restore internal math functions for unit tests
diff --git a/test/sparse_basic.cpp b/test/sparse_basic.cpp
index ad06e87..121cc05 100644
--- a/test/sparse_basic.cpp
+++ b/test/sparse_basic.cpp
@@ -179,16 +179,16 @@
         m3.insertByOuterInner(j,k) = k+1;
     for(int j=0; j<rows; ++j)
     {
-      VERIFY(j==math::real(m3.innerVector(j).nonZeros()));
+      VERIFY(j==internal::real(m3.innerVector(j).nonZeros()));
       if(j>0)
-        VERIFY(j==math::real(m3.innerVector(j).lastCoeff()));
+        VERIFY(j==internal::real(m3.innerVector(j).lastCoeff()));
     }
     m3.makeCompressed();
     for(int j=0; j<rows; ++j)
     {
-      VERIFY(j==math::real(m3.innerVector(j).nonZeros()));
+      VERIFY(j==internal::real(m3.innerVector(j).nonZeros()));
       if(j>0)
-        VERIFY(j==math::real(m3.innerVector(j).lastCoeff()));
+        VERIFY(j==internal::real(m3.innerVector(j).lastCoeff()));
     }
 
     //m2.innerVector(j0) = 2*m2.innerVector(j1);