[secur32/tests] Fix compilation for older gcc versions (and MinGW)

[Paul Vriens]

Hi,

this should fix the compilation issues report by Marcus. It also fixes the 
compilation for the crosstests.

Changelog
   Fix compilation for older gcc versions (and MinGW)

Cheers,

Paul.
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diff --git a/dlls/secur32/tests/schannel.c b/dlls/secur32/tests/schannel.c
index 0bbd96b..c289f4b 100644
--- a/dlls/secur32/tests/schannel.c
+++ b/dlls/secur32/tests/schannel.c
@@ -116,11 +116,13 @@ static void testAcquireSecurityContext(void)
     PCCERT_CONTEXT certs[2];
     HCRYPTPROV csp;
     static CHAR unisp_name_a[] = UNISP_NAME_A;
-    static WCHAR ms_def_prov_w[] = MS_DEF_PROV_W;
+    static WCHAR ms_def_prov_w[MAX_PATH];
     BOOL ret;
     HCRYPTKEY key;
     CRYPT_KEY_PROV_INFO keyProvInfo;
 
+    lstrcpyW(ms_def_prov_w, MS_DEF_PROV_W);
+
     keyProvInfo.pwszContainerName = cspNameW;
     keyProvInfo.pwszProvName = ms_def_prov_w;
     keyProvInfo.dwProvType = PROV_RSA_FULL;
-- 
1.4.4.4