py/gc: gc_dump_alloc_table(): Dump heap offset instead of actual address.

Address printed was truncated anyway and in general confusing to outsider.
A line which dumps it is still left in the source, commented, for peculiar
cases when it may be needed (e.g. when running under debugger).

py/gc.c

@@ -693,11 +693,8 @@ void gc_dump_alloc_table(void) {
             }
             // print header for new line of blocks
             // (the cast to uint32_t is for 16-bit ports)
-            #if EXTENSIVE_HEAP_PROFILING
+            //mp_printf(&mp_plat_print, "\n%05x: ", (uint)(PTR_FROM_BLOCK(bl) & (uint32_t)0xfffff));
             mp_printf(&mp_plat_print, "\n%05x: ", (uint)((bl * BYTES_PER_BLOCK) & (uint32_t)0xfffff));
-            #else
-            mp_printf(&mp_plat_print, "\n%05x: ", (uint)(PTR_FROM_BLOCK(bl) & (uint32_t)0xfffff));
-            #endif
         }
         int c = ' ';
         switch (ATB_GET_KIND(bl)) {