kernel32/tests: Comment out a couple of heap tests that crash on 64-bit Vista.

dlls/kernel32/tests/heap.c

@@ -190,6 +190,8 @@ START_TEST(heap)
     ok(mem == NULL, "Expected NULL, got %p\n", mem);
 
     /* invalid free */
+    if (sizeof(void *) != 8)  /* crashes on 64-bit Vista */
+    {
         SetLastError(MAGIC_DEAD);
         mem = GlobalFree(gbl);
         ok(mem == gbl || broken(mem == NULL) /* nt4 */, "Expected gbl, got %p\n", mem);
@@ -197,6 +199,7 @@ START_TEST(heap)
             ok(GetLastError() == ERROR_INVALID_HANDLE ||
                GetLastError() == ERROR_INVALID_PARAMETER, /* win9x */
                "Expected ERROR_INVALID_HANDLE or ERROR_INVALID_PARAMETER, got %d\n", GetLastError());
+    }
 
     gbl = GlobalAlloc(GMEM_DDESHARE, 100);
 
@@ -211,12 +214,15 @@ START_TEST(heap)
        "Expected 1 or 0, got %d\n", res);
 
     /* GlobalSize on an invalid handle */
+    if (sizeof(void *) != 8)  /* crashes on 64-bit Vista */
+    {
         SetLastError(MAGIC_DEAD);
         size = GlobalSize((HGLOBAL)0xc042);
         ok(size == 0, "Expected 0, got %ld\n", size);
         ok(GetLastError() == ERROR_INVALID_HANDLE ||
            GetLastError() == ERROR_INVALID_PARAMETER, /* win9x */
            "Expected ERROR_INVALID_HANDLE or ERROR_INVALID_PARAMETER, got %d\n", GetLastError());
+    }
 
     /* ####################################### */
     /* Local*() functions */