tdf#92505 vcl: fix substituting missing glyphs

Commit a6b00d16 (Related bnc#822625:
Cache FontEntry with the original FontSelectPattern.) and the follow-up
16a62079 (Oops, this reference can't be
const., 2014-05-28) changed the font cache key, so that it's directly
what was the argument to ImplFontCache::GetFontEntry(), which leads to
missing glyphs in the bugdoc, e.g. the 4 check mark characters are
rendered as a check mark only in the DejaVu Sans case on my machine, the
other 3 cases result in placeholders.

Fix the problem by changing back the key to aFontSelData, which is
possibly modified in ImplFontCache::GetFontEntry() before used as a key.

Change-Id: I80eb4ba0f986a10100b6ae421d1346f235ce83b7
(cherry picked from commit e047caf4)
Reviewed-on: https://gerrit.libreoffice.org/18437Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Michael Meeks <michael.meeks@collabora.com>

vcl/source/outdev/font.cxx

@@ -1258,7 +1258,6 @@ ImplFontEntry* ImplFontCache::GetFontEntry( PhysicalFontCollection* pFontList,
 ImplFontEntry* ImplFontCache::GetFontEntry( PhysicalFontCollection* pFontList,
     FontSelectPattern& aFontSelData )
 {
-    const FontSelectPattern aFontSelDataOrig(aFontSelData);
     // check if a directly matching logical font instance is already cached,
     // the most recently used font usually has a hit rate of >50%
     ImplFontEntry *pEntry = NULL;
@@ -1345,9 +1344,8 @@ ImplFontEntry* ImplFontCache::GetFontEntry( PhysicalFontCollection* pFontList,
         }
 #endif
 
-        // Add the new entry to the cache with the original FontSelectPattern,
-        // so that we can find it next time as a direct cache hit.
-        maFontInstanceList[ aFontSelDataOrig ] = pEntry;
+        // add the new entry to the cache
+        maFontInstanceList[ aFontSelData ] = pEntry;
     }
 
     mpFirstEntry = pEntry;