Avoid using '#' format spec for X hex numbers.

Avoid using '#' format spec for X (uppercase) hex numbers, as it
results in output like "0XABCDEF" instead of "0xABCDEF".

src/xenia/ui/window_win.cc

@@ -66,7 +66,7 @@ bool Win32Window::OnCreate() {
       auto spda = (decltype(&SetProcessDpiAwareness))SetProcessDpiAwareness_;
       auto res = spda(PROCESS_PER_MONITOR_DPI_AWARE);
       if (res != S_OK) {
-        XELOGW("Failed to set process DPI awareness. (code = {:#08X})", res);
+        XELOGW("Failed to set process DPI awareness. (code = 0x{:08X})", res);
       }
     }