remove undefined behavior from fuzz/2.c

tests/fuzz/2.c

diff --git a/tests/fuzz/2.c b/tests/fuzz/2.c
index 2063b2d..31ccafc 100644
--- a/tests/fuzz/2.c
+++ b/tests/fuzz/2.c
@@ -13,8 +13,6 @@
 static long __undefined;
 
 /* --- Struct/Union Declarations --- */
-#pragma pack(push)
-#pragma pack(1)
 struct S0 {
    uint32_t  f0;
    int16_t  f1;
@@ -22,7 +20,6 @@
    uint16_t  f3;
    uint8_t  f4;
 };
-#pragma pack(pop)
 
 struct S1 {
    unsigned f0 : 4;