removed warnings on Linux and Mac

Author: jermp

include/blaze/blaze/math/expressions/DVecDVecCrossExpr.h

@@ -463,7 +463,7 @@ class DVecDVecCrossExpr
    // \param index Access index. The index has to be in the range \f$[0..N-1]\f$.
    // \return Reference to the accessed values.
    */
-   BLAZE_ALWAYS_INLINE auto load( size_t index ) const noexcept {
+   BLAZE_ALWAYS_INLINE auto load( [[maybe_unused]] size_t index ) const noexcept {
       BLAZE_INTERNAL_ASSERT( index == 0UL, "Invalid vector access index" );
       LT x( serial( lhs_ ) );  // Evaluation of the left-hand side dense vector operand
       RT y( serial( rhs_ ) );  // Evaluation of the right-hand side dense vector operand

include/blaze/blaze/math/lapack/pstrf.h

@@ -158,7 +158,7 @@ inline blas_int_t pstrf( DenseMatrix<MT,SO>& A, char uplo, blas_int_t* piv, ST t
 
    BLAZE_INTERNAL_ASSERT( info >= 0, "Invalid argument for Cholesky decomposition" );
 
-   for( size_t i=0UL; i<n; ++i ) {
+   for( blas_int_t i=0; i<n; ++i ) {
       --piv[i];  // Adapt from Fortran 1-based to C 0-based indexing
    }