Fix typos

Change-Id: I77c4c8feb12d7ed6ee4b4eaa6132a91f4e655fbc
Reviewed-on: https://gerrit.libreoffice.org/55967
Tested-by: Jenkins
Reviewed-by: Jens Carl <j.carl43@gmx.de>

framework/source/services/frame.cxx

@@ -2617,7 +2617,7 @@ void SAL_CALL Frame::windowHidden( const css::lang::EventObject& )
     @short      called by dispose of our windows!
     @descr      This object is forced to release all references to the interfaces given
                 by the parameter source. We are a listener at our container window and
-                should listen for his diposing.
+                should listen for his disposing.
 
     @seealso    XWindowListener
     @seealso    XTopWindowListener

include/svx/gridctrl.hxx

@@ -254,7 +254,7 @@ private:
         // property listeners for field values
 
     std::unique_ptr<DisposeListenerGridBridge>      m_pCursorDisposeListener;
-        // need to know about the diposing of the seek cursor
+        // need to know about the disposing of the seek cursor
         // construct analogous to the data source proplistener/multiplexer above :
         // DisposeListenerGridBridge is a bridge from FmXDisposeListener which I don't want to be derived from