Use a void* in the argument list of MatShellGetContext as required by the compiler.

git-svn-id: https://svn.dealii.org/trunk@26719 0785d39b-7218-0410-832d-ea1e28bc413d

diff --git a/deal.II/source/lac/petsc_matrix_free.cc b/deal.II/source/lac/petsc_matrix_free.cc
index d9a6ae207bc0f9044b3376961408ec1eb292d6aa..24ffc9a68e21496b8ff34371ff96daf04a7ed77e 100755 (executable)
--- a/deal.II/source/lac/petsc_matrix_free.cc
+++ b/deal.II/source/lac/petsc_matrix_free.cc
@@ -246,12 +246,12 @@ namespace PETScWrappers
                                      // object and link the given matrix A
                                      // to the matrix-vector multiplication
                                      // of this MatrixFree object,
-    MatrixFree  *this_object;
+    void  *this_object;
     int ierr = MatShellGetContext (A, &this_object);
     AssertThrow (ierr == 0, ExcPETScError(ierr));
 
                                      // call vmult of this object:
-    this_object->vmult (dst, src);
+    reinterpret_cast<MatrixFree*>(this_object)->vmult (dst, src);
 
     return (0);
   }