NAND: Add missing declaration to non-redundant saveenv().

Signed-off-by: Scott Wood <scottwood@freescale.com>

common/env_nand.c

@@ -230,7 +230,8 @@ int saveenv(void)
 {
 	size_t total;
 	int ret = 0;
-
+	nand_erase_options_t nand_erase_options;
+	
 	nand_erase_options.length = CFG_ENV_RANGE;
 	nand_erase_options.quiet = 0;
 	nand_erase_options.jffs2 = 0;