remove compile warning.

git-svn-id: https://rt-thread.googlecode.com/svn/trunk@308 bbd45198-f89e-11dd-88c7-29a3b14d5316

finsh/cmd.c

@@ -380,6 +380,8 @@ void list_prefix(char* prefix)
 
 	func_cnt = 0;
 	var_cnt  = 0;
+	name_ptr = RT_NULL;
+
 	{
 		struct finsh_syscall* index;
 		for (index = _syscall_table_begin; index < _syscall_table_end; index ++)

finsh/finsh.h

@@ -69,6 +69,9 @@ char *strdup(const char *s);
 int isalpha( int ch );
 int atoi(const char* s);
 #else
+/* use libc of armcc */
+#include <ctype.h>
+#include <stdlib.h>
 #include <string.h>
 #endif
 #endif

finsh/shell.c

@@ -114,6 +114,7 @@ char *strdup(const char *s)
 }
 #endif
 
+#if !defined(__CC_ARM) && !defined(__ICCARM__)
 int isalpha( int ch )
 {
 	return (unsigned int)((ch | 0x20) - 'a') < 26u;
@@ -144,6 +145,7 @@ int isprint(unsigned char ch)
     return (unsigned int)(ch - ' ') < 127u - ' ';
 }
 #endif
+#endif
 
 #ifdef RT_USING_DEVICE
 static rt_err_t finsh_rx_ind(rt_device_t dev, rt_size_t size)