only call XFreePixmap on pixmaps created via XCreatePixmap

not on those belonging to gdk shoe-horned in via

mpPixmap = GDK_PIXMAP_XID( mpGdkPixmap );

in GdkX11Pixmap::GdkX11Pixmap

This stops file->new->presentation crashing on second invocation

Change-Id: Iec673497f900b0ddabd439369b9ffe554800d425

vcl/inc/unx/pixmap.hxx

@@ -36,6 +36,7 @@ protected:
     Display*        mpDisplay;
     SalX11Screen    mnScreen;
     Pixmap          mpPixmap;
+    bool            mbDeletePixmap;
     int             mnWidth;
     int             mnHeight;
     int             mnDepth;

vcl/unx/generic/gdi/pixmap.cxx

@@ -13,6 +13,7 @@ X11Pixmap::X11Pixmap()
 : mpDisplay( NULL )
 , mnScreen( 0 )
 , mpPixmap( 0 )
+, mbDeletePixmap( false )
 , mnWidth( -1 )
 , mnHeight( -1 )
 , mnDepth( 0 )
@@ -22,6 +23,7 @@ X11Pixmap::X11Pixmap()
 X11Pixmap::X11Pixmap( Display* pDisplay, SalX11Screen nScreen, int nWidth, int nHeight, int nDepth )
 : mpDisplay( pDisplay )
 , mnScreen( nScreen )
+, mbDeletePixmap( true )
 , mnWidth( nWidth )
 , mnHeight( nHeight )
 , mnDepth( nDepth )
@@ -33,17 +35,19 @@ X11Pixmap::X11Pixmap( Display* pDisplay, SalX11Screen nScreen, int nWidth, int n
 X11Pixmap::X11Pixmap( X11Pixmap& rOther )
 : mpDisplay( rOther.mpDisplay )
 , mnScreen( rOther.mnScreen )
+, mbDeletePixmap( rOther.mbDeletePixmap )
 , mnWidth( rOther.mnWidth )
 , mnHeight( rOther.mnHeight )
 , mnDepth( rOther.mnDepth )
 {
     mpPixmap = rOther.mpPixmap;
     rOther.mpPixmap = 0;
+    rOther.mbDeletePixmap = false;
 }
 
 X11Pixmap::~X11Pixmap()
 {
-    if( mpPixmap )
+    if (mbDeletePixmap && mpPixmap)
         XFreePixmap( mpDisplay, mpPixmap );
 }
 

vcl/unx/gtk/gdi/salnativewidgets-gtk.cxx

@@ -290,7 +290,7 @@ GdkX11Pixmap::GdkX11Pixmap( int nWidth, int nHeight, int nDepth )
 }
 
 GdkX11Pixmap::GdkX11Pixmap( X11Pixmap& rOther, GdkWindow *pWindow )
-: X11Pixmap( rOther )
+    : X11Pixmap(rOther)
 {
     GdkColormap* pColormap;