Merge branch 'mediaplayer_sample'

Add wxMC_NO_AUTORESIZE and use it in mediaplayer sample to fix it
layout.

See https://github.com/wxWidgets/wxWidgets/pull/2562

interface/wx/mediactrl.h

@@ -5,6 +5,8 @@
 // Licence:     wxWindows licence
 /////////////////////////////////////////////////////////////////////////////
 
+#define wxMC_NO_AUTORESIZE         0x0001
+
 /**
     Describes the current state of the media.
 
@@ -225,6 +227,18 @@ public:
     wxActiveXContainer documentation.
 
 
+    @beginStyleTable
+    @style{wxMC_NO_AUTORESIZE}
+           By default, the control will automatically adjust its size to
+           exactly fit the size of a loaded video as soon as a video is loaded.
+           If this flag is given, the control will not change its size
+           automatically and it must be done manually (if desired) using Layout().
+           It is strongly recommended to use this flag and handle control
+           resizing manually (note that this style is only available in
+           wxWidgets 3.1.6, so it is only possible to do it when using this or
+           later version).
+    @endStyleTable
+
     @library{wxmedia}
     @category{media}
 
@@ -255,7 +269,8 @@ public:
         @param size
             Size to put the control at and to stretch movie to.
         @param style
-            Optional styles.
+            Optional styles. It is recommended to use ::wxMC_NO_AUTORESIZE,
+            although it is not used by default for compatibility reasons.
         @param szBackend
             Name of backend you want to use, leave blank to make wxMediaCtrl figure it out.
         @param validator
@@ -289,7 +304,8 @@ public:
         @param size
             Size to put the control at and to stretch movie to.
         @param style
-            Optional styles.
+            Optional styles. It is recommended to use ::wxMC_NO_AUTORESIZE,
+            although it is not used by default for compatibility reasons.
         @param szBackend
             Name of backend you want to use, leave blank to make wxMediaCtrl figure it out.
         @param validator