Fix build with magma

examples/cholesky/cholesky_kernels.c

@@ -191,7 +191,6 @@ static inline void chol_common_codelet_update_u11(void *descr[], int s, STARPU_A
 				fprintf(stderr, "Error in Magma: %d\n", ret);
 				STARPU_ABORT();
 			}
-			STARPU_ASSERT(!cures);
 			}
 #else
 			{