8065286: Fewer subtable substitutions

Reviewed-by: bae, srl, mschoene

src/share/native/sun/font/layout/MultipleSubstSubtables.cpp

@@ -71,6 +71,9 @@ le_uint32 MultipleSubstitutionSubtable::process(const LETableReference &base, Gl
     if (coverageIndex >= 0 && coverageIndex < seqCount) {
         Offset sequenceTableOffset = SWAPW(sequenceTableOffsetArray[coverageIndex]);
         LEReferenceTo<SequenceTable>   sequenceTable(base, success, sequenceTableOffset);
+        if (LE_FAILURE(success)) {
+            return 0;
+        }
         le_uint16 glyphCount = SWAPW(sequenceTable->glyphCount);
 
         if (glyphCount == 0) {