build: define HAVE_STDIO_H on Windows desktop.

build/vs2010/Lol.Core.Vars.props

@@ -73,6 +73,9 @@
     <XinputDeps>xinput.lib</XinputDeps>
     <Win32Defines>USE_XINPUT;$(Win32Defines)</Win32Defines>
 
+    <!-- Windows-specific -->
+    <Win32Defines>HAVE_STDIO_H;$(Win32Defines)</Win32Defines>
+
     <!-- PS3-specific -->
     <Ps3Deps>libsysmodule_stub.a;libsysutil_stub.a;libresc_stub.a;
              libpngdec_stub.a;