nb must be defined anyway

compute/pzpotrf.c

@@ -59,6 +59,8 @@ void morse_pzpotrf(MORSE_enum uplo, MORSE_desc_t *A,
     {
 #if !defined(CHAMELEON_SIMULATION)
         int nb = magma_get_zpotrf_nb(A->nb);
+#else
+        nb = A->nb;
 #endif
         ws_host = sizeof(MORSE_Complex64_t)*nb*nb;
     }

compute/pzpotrimm.c

@@ -61,6 +61,8 @@ void morse_pzpotrimm(MORSE_enum uplo, MORSE_desc_t *A, MORSE_desc_t *B, MORSE_de
     {
 #if !defined(CHAMELEON_SIMULATION)
         int nb = magma_get_zpotrf_nb(A->nb);
+#else
+        nb = A->nb;
 #endif
         RUNTIME_options_ws_alloc( &options, nb*nb, 0 );
     }