Work around MSVC definition of infinity

Use the same implementation as in js_number_funcs.

Ref: #1275 (comment)

Author: saghul

quickjs.c

@@ -53996,8 +53996,10 @@ static const JSCFunctionListEntry js_global_funcs[] = {
     JS_CFUNC_MAGIC_DEF("encodeURIComponent", 1, js_global_encodeURI, 1 ),
     JS_CFUNC_DEF("escape", 1, js_global_escape ),
     JS_CFUNC_DEF("unescape", 1, js_global_unescape ),
-    JS_PROP_DOUBLE_DEF("Infinity", 1.0 / 0.0, 0 ),
-    JS_PROP_U2D_DEF("NaN", 0x7FF8ull<<48, 0 ), // workaround for msvc
+    // workarounds for msvc & djgpp where NAN and INFINITY
+    // are not compile-time expressions
+    JS_PROP_U2D_DEF("Infinity", 0x7FF0ull<<48, 0 ),
+    JS_PROP_U2D_DEF("NaN", 0x7FF8ull<<48, 0 ),
     JS_PROP_UNDEFINED_DEF("undefined", 0 ),
     JS_PROP_STRING_DEF("[Symbol.toStringTag]", "global", JS_PROP_CONFIGURABLE ),
     JS_CFUNC_DEF("eval", 1, js_global_eval ),