awk: fix typo in atan2 code. closes bug 5594.
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(log yok)
| @@ -2025,7 +2025,7 @@ static var *exec_builtin(node *op, var *res) | |
| case B_a2: | |
| #if ENABLE_FEATURE_AWK_MATH | |
| - | setvar_i(res, atan2(getvar_i(av[i]), getvar_i(av[1]))); |
| + | setvar_i(res, atan2(getvar_i(av[0]), getvar_i(av[1]))); |
| #else | |
| syntax_error(EMSG_NO_MATH); | |
| #endif | |