Linux: fix jump jump based on uninitialised value.

third_party/harfbuzz/src/harfbuzz-shaper.cpp

Index: third_party/harfbuzz/src/harfbuzz-shaper.cpp
diff --git a/third_party/harfbuzz/src/harfbuzz-shaper.cpp b/third_party/harfbuzz/src/harfbuzz-shaper.cpp
index 36b92822e9363d00e3a766a5e9b258f9b2498269..3628c88cbbde7583fc2b656bd33348a45a7c0fb0 100644
--- a/third_party/harfbuzz/src/harfbuzz-shaper.cpp
+++ b/third_party/harfbuzz/src/harfbuzz-shaper.cpp
@@ -433,7 +433,7 @@ void HB_HeuristicSetGlyphAttributes(HB_ShaperItem *item)
 
     // ### zeroWidth and justification are missing here!!!!!
 
-    assert(item->num_glyphs <= length);
+    assert(length <= item->num_glyphs);
 
 //     qDebug("QScriptEngine::heuristicSetGlyphAttributes, num_glyphs=%d", item->num_glyphs);
     HB_GlyphAttributes *attributes = item->attributes;
@@ -451,7 +451,6 @@ void HB_HeuristicSetGlyphAttributes(HB_ShaperItem *item)
         }
         ++glyph_pos;
     }
-    assert(glyph_pos == item->num_glyphs);
 
     // first char in a run is never (treated as) a mark
     int cStart = 0;