asm reference not recoqnized when compiling i386

[Tryan18]

--- ofsoftswitch13-open_wrt/lib/backtrace.c.orig 2014-04-15 13:17:29.672090075 +0200
+++ ofsoftswitch13-open_wrt/lib/backtrace.c 2014-04-15 13:14:00.420100446 +0200
@@ -88,7 +88,7 @@
{
#ifdef i386
uintptr_t low;

• asm("movl %%esp,%0" : "=g" (low));
• asm ("movl %%esp,%0" : "=g" (low));
  return low;
  #else
  /* This causes a warning in GCC that cannot be disabled, so use it only on