test/asn1_time_test.c: fix pre-C90 warning.

Reviewed-by: Rich Salz <rsalz@openssl.org>
Reviewed-by: Paul Dale <paul.dale@oracle.com>

test/asn1_time_test.c

diff --git a/test/asn1_time_test.c b/test/asn1_time_test.c
index 113b6fb..9b44b71 100644
--- a/test/asn1_time_test.c
+++ b/test/asn1_time_test.c
@@ -89,7 +89,7 @@
     { "20380119031408Z",   V_ASN1_GENERALIZEDTIME, V_ASN1_UTCTIME,         1,  (time_t)0x80000000,  1, 1, },
     { "20380119031409Z",   V_ASN1_GENERALIZEDTIME, V_ASN1_UTCTIME,         1,  (time_t)0x80000001,  1, 1, },
     { "380119031408Z",     V_ASN1_UTCTIME,         V_ASN1_UTCTIME,         1,  (time_t)0x80000000,  1, 1, },
-    { "20500101120000Z",   V_ASN1_GENERALIZEDTIME, V_ASN1_GENERALIZEDTIME, 1,  (time_t)2524651200,  1, 0, },
+    { "20500101120000Z",   V_ASN1_GENERALIZEDTIME, V_ASN1_GENERALIZEDTIME, 1,  (time_t)0x967b1ec0,  1, 0, },
 };
 
 /* ASSUMES SIGNED TIME_T */