oox: fix a few bogus SAL_WARN

The idea is that when an element is unhandled, it's either unhandled
explicitly by an empty "case..break" block (so grep can quickly find it)
or we raise a warning. Add a few placeholders for cases that we won't
probably handle better in the near future to silence warnings.

Change-Id: I41dec7802c4671550130393b4f98a8f0d8dfc059

oox/source/drawingml/shapecontext.cxx

@@ -103,6 +103,7 @@ ContextHandlerRef ShapeContext::onCreateContext( sal_Int32 aElementToken, const
     case XML_txXfrm:
     {
         mpShapePtr->getTextBody()->getTextProperties().moRotation = rAttribs.getInteger( XML_rot );
+        return 0;
         break;
     }
     case XML_cNvSpPr:
@@ -120,6 +121,10 @@ ContextHandlerRef ShapeContext::onCreateContext( sal_Int32 aElementToken, const
         break;
     case XML_nvPicPr:
         break;
+    case XML_relIds:
+        break;
+    case XML_nvSpPr:
+        break;
     default:
         SAL_WARN("oox", "ShapeContext::onCreateContext: unhandled element: " << getBaseToken(aElementToken));
         break;

oox/source/drawingml/shapegroupcontext.cxx

@@ -75,6 +75,8 @@ ContextHandlerRef ShapeGroupContext::onCreateContext( sal_Int32 aElementToken, c
 
     case XML_grpSpPr:
         return new ShapePropertiesContext( *this, *mpGroupShapePtr );
+    case XML_nvGrpSpPr:
+        return 0;
     case XML_spPr:
         return new ShapePropertiesContext( *this, *mpGroupShapePtr );
 /*

oox/source/drawingml/textcharacterpropertiescontext.cxx

@@ -216,7 +216,7 @@ ContextHandlerRef TextCharacterPropertiesContext::onCreateContext( sal_Int32 aEl
             }
             break;
         default:
-            SAL_INFO("oox", "TextCharacterPropertiesContext::onCreateContext: unhandled element: " << getBaseToken(aElementToken));
+            SAL_WARN("oox", "TextCharacterPropertiesContext::onCreateContext: unhandled element: " << getBaseToken(aElementToken));
             break;
     }