Use lapack_int type for matrix dimension

src/libnptm/lapack_calls.cpp

@@ -17,7 +17,7 @@ void zinvert(std::complex<double> **mat, lapack_int n, int &jer) {
     }
   }
   
-  int* IPIV = new int[n]();
+  lapack_int* IPIV = new lapack_int[n]();
   
   LAPACKE_zgetrf(LAPACK_ROW_MAJOR, n, n, arr, n, IPIV);
   LAPACKE_zgetri(LAPACK_ROW_MAJOR, n, arr, n, IPIV);