env: superfluous check before free()

Free() checks if its argument in NULL. There is no need for the caller to
do the same.

Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
diff --git a/env/flash.c b/env/flash.c
index ebee906..473e824 100644
--- a/env/flash.c
+++ b/env/flash.c
@@ -210,8 +210,7 @@
 perror:
 	flash_perror(rc);
 done:
-	if (saved_data)
-		free(saved_data);
+	free(saved_data);
 	/* try to re-protect */
 	flash_sect_protect(1, (ulong)flash_addr, end_addr);
 	flash_sect_protect(1, (ulong)flash_addr_new, end_addr_new);
@@ -298,8 +297,7 @@
 perror:
 	flash_perror(rc);
 done:
-	if (saved_data)
-		free(saved_data);
+	free(saved_data);
 	/* try to re-protect */
 	flash_sect_protect(1, (long)flash_addr, end_addr);
 	return rc;