Fix two SfxFilterMatcher_Impl memory leaks.

First SfxFilterMatcher_Impl::InitForIterating() will set pList to either
the global filter array matcher pFilterArr, or to a new SfxFilterList_Impl.
This new SfxFilterList_Impl should be deleted in the destructor.

Second getSfxFilterMatcher_Impl() keeps a cache of SfxFilterMatcher_Impls.
If a SfxFilterMatcher_Impl for a given name doesn't exist yet a new one
will be created. But the cache stored objects by service name (aName), but
looked object up by factory name (rName). So it always created a new
SfxFilterMatcher_Impl instead of using the one from the aImplArr cache.

Change-Id: I7840aaddc861f609fbe14d5b6c0ea20d997f690f
Reviewed-on: https://gerrit.libreoffice.org/3989Reviewed-by: Fridrich Strba <fridrich@documentfoundation.org>
Tested-by: Fridrich Strba <fridrich@documentfoundation.org>

sfx2/source/bastyp/fltfnc.cxx

@@ -255,6 +255,14 @@ public:
         , pList(0)
     {
     }
+    ~SfxFilterMatcher_Impl()
+    {
+        // SfxFilterMatcher_Impl::InitForIterating() will set pList to
+        // either the global filter array matcher pFilterArr, or to
+        // a new SfxFilterList_Impl.
+        if (pList != pFilterArr)
+            delete pList;
+    }
 };
 
 namespace
@@ -287,7 +295,7 @@ namespace
         // previously
         SfxFilterMatcherArr_Impl::iterator aEnd = aImplArr.end();
         SfxFilterMatcherArr_Impl::iterator aIter =
-            std::find_if(aImplArr.begin(), aEnd, hasName(rName));
+            std::find_if(aImplArr.begin(), aEnd, hasName(aName));
         if (aIter != aEnd)
             return *aIter;