Fix compile of Skins2 on Windows

Fix for [1f579327] for Windows

configure.ac

@@ -732,15 +732,16 @@ AC_CHECK_LIB(m,exp,[
 AC_CHECK_LIB(m,round,[
   VLC_ADD_LIBS([dbus],[-lm])
 ])
-AC_CHECK_LIB(m,lrintf, [
-  AC_DEFINE(HAVE_LRINTF, 1, [Define to 1 if you have the lrintf function])
-  VLC_ADD_LIBS([skins2],[-lm])
-])
 AC_CHECK_LIB(m,sqrtf,[
   VLC_ADD_LIBS([x264],[-lm])
 ])
 fi # end "${SYS}" != "mingw32" -a "${SYS}" != "mingwce"
 
+AC_CHECK_LIB(m,lrintf, [
+  AC_DEFINE(HAVE_LRINTF, 1, [Define to 1 if you have the lrintf function])
+  VLC_ADD_LIBS([skins2],[-lm])
+])
+
 dnl Check for dynamic plugins
 ac_cv_have_plugins=no