Preserve WM hints that were set during window creation by calling XGetWMHints prior to XSetWMHints.

diff --git a/include/ts_xutil.h b/include/ts_xutil.h
index 007b2b2..a5bc723 100644
--- a/include/ts_xutil.h
+++ b/include/ts_xutil.h

@@ -27,6 +27,7 @@
 extern int  TSXEqualRegion(Region, Region);
 extern int  TSXFindContext(Display*, XID, XContext, XPointer*);
 extern XVisualInfo * TSXGetVisualInfo(Display*, long, XVisualInfo*, int*);
+extern XWMHints * TSXGetWMHints(Display*, Window);
 extern int   TSXGetWMSizeHints(Display*, Window, XSizeHints*, long*, Atom);
 extern int  TSXIntersectRegion(Region, Region, Region);
 extern int  TSXLookupString(XKeyEvent*, char*, int, KeySym*, XComposeStatus*);

diff --git a/tsx11/X11_calls b/tsx11/X11_calls
index 5a558ca..88b9c82 100644
--- a/tsx11/X11_calls
+++ b/tsx11/X11_calls

@@ -75,6 +75,7 @@
 XGetScreenSaver
 XGetSelectionOwner
 XGetVisualInfo
+XGetWMHints
 XGetWMSizeHints
 XGetWindowAttributes
 XGetWindowProperty

diff --git a/tsx11/ts_xutil.c b/tsx11/ts_xutil.c
index 638a614..0eb2a372 100644
--- a/tsx11/ts_xutil.c
+++ b/tsx11/ts_xutil.c

@@ -138,6 +138,17 @@
   return r;
 }
 
+XWMHints * TSXGetWMHints(Display* a0, Window a1)
+{
+  XWMHints * r;
+  TRACE("Call XGetWMHints\n");
+  EnterCriticalSection( &X11DRV_CritSection );
+  r = XGetWMHints(a0, a1);
+  LeaveCriticalSection( &X11DRV_CritSection );
+  TRACE("Ret XGetWMHints\n");
+  return r;
+}
+
 int   TSXGetWMSizeHints(Display* a0, Window a1, XSizeHints* a2, long* a3, Atom a4)
 {
   int   r;

diff --git a/windows/x11drv/wnd.c b/windows/x11drv/wnd.c
index 6f82203..c9bd458 100644
--- a/windows/x11drv/wnd.c
+++ b/windows/x11drv/wnd.c

@@ -249,12 +249,14 @@
 
     X11DRV_WND_IconChanged(wndPtr);
 
-    wm_hints = TSXAllocWMHints();
-
-    X11DRV_WND_SetIconHints(wndPtr, wm_hints);
-
-    TSXSetWMHints( display, X11DRV_WND_GetXWindow(wndPtr), wm_hints );
-    TSXFree( wm_hints );
+    wm_hints = TSXGetWMHints( display, X11DRV_WND_GetXWindow(wndPtr) );
+    if (!wm_hints) wm_hints = TSXAllocWMHints();
+    if (wm_hints)
+    {
+        X11DRV_WND_SetIconHints(wndPtr, wm_hints);
+        TSXSetWMHints( display, X11DRV_WND_GetXWindow(wndPtr), wm_hints );
+        TSXFree( wm_hints );
+    }
 }
 
 
@@ -362,7 +364,7 @@
           WIN_ReleaseWndPtr(tmpWnd);
       }
 
-      wm_hints = TSXAllocWMHints();
+      if ((wm_hints = TSXAllocWMHints()))
       {
 	  wm_hints->flags = InputHint | StateHint | WindowGroupHint;
 	  wm_hints->input = True;
@@ -831,7 +833,9 @@
  */
 static BOOL X11DRV_SetWMHint(Display* display, WND* wndPtr, int hint, int val)
 {
-    XWMHints* wm_hints = TSXAllocWMHints();
+    XWMHints* wm_hints = TSXGetWMHints( display, X11DRV_WND_GetXWindow(wndPtr) );
+    if (!wm_hints) wm_hints = TSXAllocWMHints();
+    if (wm_hints)
     {
         wm_hints->flags = hint;
 	switch( hint )