svx: prefix members of SvxOle2Shape

See tdf#94879 for motivation.

No problem with _ suffixes, but parent SvxShape uses m_ prefixes, so
switch to that here as well for consistency.

Change-Id: I7a1f8630c5281c629a5b02ffe51fd9df208602dc
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/180153
Reviewed-by: Miklos Vajna <vmiklos@collabora.com>
Tested-by: Jenkins

include/svx/unoshape.hxx

@@ -587,7 +587,7 @@ public:
 class UNLESS_MERGELIBS_MORE(SVXCORE_DLLPUBLIC) SvxOle2Shape : public SvxShapeText
 {
 private:
-    OUString referer_;
+    OUString m_referer;
 protected:
     // override these for special property handling in subcasses. Return true if property is handled
     virtual bool setPropertyValueImpl( const OUString& rName, const SfxItemPropertyMapEntry* pProperty, const css::uno::Any& rValue ) override;

svx/source/unodraw/unoshap4.cxx

@@ -67,13 +67,13 @@ using namespace ::com::sun::star::beans;
 SvxOle2Shape::SvxOle2Shape(SdrObject* pObject, OUString referer)
     : SvxShapeText(pObject, getSvxMapProvider().GetMap(SVXMAP_OLE2),
                 getSvxMapProvider().GetPropertySet(SVXMAP_OLE2,SdrObject::GetGlobalDrawObjectItemPool()))
-    , referer_(std::move(referer))
+    , m_referer(std::move(referer))
 {
 }
 
 SvxOle2Shape::SvxOle2Shape(SdrObject* pObject, OUString referer, std::span<const SfxItemPropertyMapEntry> pPropertyMap, const SvxItemPropertySet* pPropertySet)
     : SvxShapeText(pObject, pPropertyMap, pPropertySet)
-    , referer_(std::move(referer))
+    , m_referer(std::move(referer))
 {
 }
 
@@ -452,7 +452,7 @@ void SvxOle2Shape::createLink( const OUString& aLinkURL )
 
     uno::Sequence< beans::PropertyValue > aMediaDescr{
         comphelper::makePropertyValue(u"URL"_ustr, aLinkURL),
-        comphelper::makePropertyValue(u"Referer"_ustr, referer_)
+        comphelper::makePropertyValue(u"Referer"_ustr, m_referer)
     };
 
     uno::Reference< task::XInteractionHandler > xInteraction = pPersist->getInteractionHandler();