【修正】字符串 ENV 返回可能不存在结束符的问题。

Signed-off-by: armink <armink.ztl@gmail.com>

easyflash/inc/ef_cfg.h

@@ -79,7 +79,7 @@
 /* backup area start address */
 #define EF_START_ADDR             /* @note you must define it for a value */
 
-/* ENV area size. It's at least one empty sector for GC. So it's definination must more then or equal 2 flash sector size. */
+/* ENV area size. It's at least one empty sector for GC. So it's definition must more then or equal 2 flash sector size. */
 #define ENV_AREA_SIZE             /* @note you must define it for a value if you used ENV */
 
 /* saved log area size */

easyflash/src/ef_env.c

@@ -580,12 +580,13 @@ size_t ef_get_env_blob(const char *key, void *value_buf, size_t buf_len, size_t
  */
 char *ef_get_env(const char *key)
 {
-    static char value[EF_STR_ENV_VALUE_MAX_SIZE];
+    static char value[EF_STR_ENV_VALUE_MAX_SIZE + 1];
     size_t get_size;
 
-    if ((get_size = ef_get_env_blob(key, value, sizeof(value), NULL)) > 0) {
+    if ((get_size = ef_get_env_blob(key, value, EF_STR_ENV_VALUE_MAX_SIZE, NULL)) > 0) {
         /* the return value must be string */
         if (ef_is_str((uint8_t *)value, get_size)) {
+            value[get_size] = '\0';
             return value;
         } else {
             EF_INFO("Warning: The ENV value isn't string. Could not be returned\n");