Support Type1 font files with incomplete /CharStrings definitions (issue 14462)

Please refer to https://www.pdfa.org/norm-refs/Type1Fonts.pdf#page=15 for the expected format for the /CharStrings entries.
In the referenced PDF document the /CharStrings are missing the expected end-token, which causes us to swallow the start of the next glyph name.

test/pdfs/.gitignore

@@ -483,6 +483,7 @@
 !tiling-pattern-box.pdf
 !tiling-pattern-large-steps.pdf
 !issue13201.pdf
+!issue14462_reduced.pdf
 !issue11555.pdf
 !issue12337.pdf
 !pr12564.pdf

test/test_manifest.json

@@ -3699,6 +3699,12 @@
        "link": true,
        "type": "eq"
     },
+    {  "id": "issue14462",
+       "file": "pdfs/issue14462_reduced.pdf",
+       "md5": "afe38169322f8e124eaeae00f94ea596",
+       "rounds": 1,
+       "type": "eq"
+    },
     {  "id": "preistabelle",
       "file": "pdfs/preistabelle.pdf",
       "md5": "d2f0b2086160d4f3d325c79a5dc1fb4d",