Fix bug: memory leak.

ChangeLog

@@ -1,6 +1,7 @@
 User johns
 Date:
 
+    Fix bug: memory leak.
     PIP close clears the last used PIP channel.
     Fix bug: -DOSD_DEBUG uses old (deleted) variable.
     Fix bug: Option softhddevice.BlackPicture has no effect.

video.c

@@ -912,13 +912,13 @@ static void GlxOsdClear(void)
     // FIXME: if not; use zero buffer
     // FIXME: if not; use dirty area
 
-    texbuf = calloc(OsdWidth * OsdHeight, 4);
-
     // set glx context
     if (!glXMakeCurrent(XlibDisplay, VideoWindow, GlxContext)) {
 	Error(_("video/glx: can't make glx context current\n"));
 	return;
     }
+
+    texbuf = calloc(OsdWidth * OsdHeight, 4);
     GlxUploadOsdTexture(0, 0, OsdWidth, OsdHeight, texbuf);
     glXMakeCurrent(XlibDisplay, None, NULL);