use Runtime::setError to report error.

Author: xicilion

fibjs/include/path.h

@@ -588,10 +588,11 @@ inline result_t _fullpath_win32(exlib::string path, exlib::string& retVal)
         return CHECK_ERROR(LastError());
 
     retVal = utf16to8String(utf16_buffer, (int32_t)utf16_len);
+
+    return 0;
 #else
-    ThrowError("not supported on none Win32 platform !");
+    return Runtime::setError("not supported on none Win32 platform !");
 #endif
-    return 0;
 }
 
 } /* namespace fibjs */