pptx: export slide transition direction parameter correctly

The direction of wipe transition was not exported correctly, left
was right, right was left, up was down and down was up. :)

Change-Id: Ibc709476c03d6c96204fb5fe91d37823a185fa97

sd/source/filter/eppt/pptx-epptooxml.cxx

@@ -446,18 +446,19 @@ const char* PowerPointExport::GetSideDirection( sal_uInt8 nDirection )
 {
     const char* pDirection = NULL;
 
-    switch( nDirection ) {
+    switch(nDirection)
+    {
     case 0:
-        pDirection = "r";
+        pDirection = "l";
         break;
     case 1:
-        pDirection = "d";
+        pDirection = "u";
         break;
     case 2:
-        pDirection = "l";
+        pDirection = "r";
         break;
     case 3:
-        pDirection = "u";
+        pDirection = "d";
         break;
     }
 
@@ -640,6 +641,7 @@ void PowerPointExport::WriteTransition( FSHelperPtr pFS )
         case PPT_TRANSITION_TYPE_NONE:
         default:
         nTransition = 0;
+        break;
     }
 
     if( nTransition )