jscript: Added Math_SQRT1_2 implementations and tests.

dlls/jscript/math.c

@@ -127,8 +127,8 @@ static HRESULT Math_SQRT2(DispatchEx *dispex, LCID lcid, WORD flags, DISPPARAMS
 static HRESULT Math_SQRT1_2(DispatchEx *dispex, LCID lcid, WORD flags, DISPPARAMS *dp,
         VARIANT *retv, jsexcept_t *ei, IServiceProvider *sp)
 {
-    FIXME("\n");
-    return E_NOTIMPL;
+    TRACE("\n");
+    return math_constant(M_SQRT1_2, flags, retv);
 }
 
 /* ECMA-262 3rd Edition    15.8.2.12 */

dlls/jscript/tests/api.js

@@ -680,4 +680,9 @@ ok(Math.floor(Math.SQRT2*100) === 141, "Math.SQRT2 = " + Math.SQRT2);
 Math.SQRT2 = "test";
 ok(Math.floor(Math.SQRT2*100) === 141, "modified Math.SQRT2 = " + Math.SQRT2);
 
+ok(typeof(Math.SQRT1_2) === "number", "typeof(Math.SQRT1_2) = " + typeof(Math.SQRT1_2));
+ok(Math.floor(Math.SQRT1_2*100) === 70, "Math.SQRT1_2 = " + Math.SQRT1_2);
+Math.SQRT1_2 = "test";
+ok(Math.floor(Math.SQRT1_2*100) === 70, "modified Math.SQRT1_2 = " + Math.SQRT1_2);
+
 reportSuccess();