remove errno in minilibc

git-svn-id: https://rt-thread.googlecode.com/svn/trunk@1686 bbd45198-f89e-11dd-88c7-29a3b14d5316

components/libc/minilibc/stdlib.c

@@ -17,7 +17,6 @@
 #if !defined (RT_USING_NEWLIB) && defined (RT_USING_MINILIBC)
 #include "stdlib.h"
 
-int errno = 0;
 int atoi(const char* s)
 {
 	long int v=0;