Coverity doesn't like testutil_assert() on fopen calls

162

CID 1399729 (#1 of 1): Side effect in assertion (ASSERT_SIDE_EFFECT)

assignment_where_comparison_intended: Assignment res_fp = fopen("WT_TEST/__slvg.result", "w") has a side effect. This code will work differently in a non-debug build.

   	Did you intend to use a comparison ("==") instead?

163        testutil_assert((res_fp = fopen(RSLT, "w")) != NULL);