Fix a small bug in GlyphLine#equals

DEVSIX-1983

Author: Snipx

io/src/main/java/com/itextpdf/io/font/otf/GlyphLine.java

@@ -338,12 +338,12 @@ public boolean equals(Object obj) {
             int otherPos = other.start + i - start;
             Glyph myGlyph = get(i);
             Glyph otherGlyph = other.get(otherPos);
-            if (myGlyph == null && otherGlyph != null || !myGlyph.equals(otherGlyph)) {
+            if (myGlyph == null && otherGlyph != null || myGlyph != null && !myGlyph.equals(otherGlyph)) {
                 return false;
             }
             ActualText myAT = actualText == null ? null : actualText.get(i);
             ActualText otherAT = other.actualText == null ? null : other.actualText.get(otherPos);
-            if (myAT == null && otherAT != null || !myAT.equals(otherAT)) {
+            if (myAT == null && otherAT != null || myAT != null && !myAT.equals(otherAT)) {
                 return false;
             }
         }

io/src/test/java/com/itextpdf/io/font/otf/GlyphLineTest.java

@@ -0,0 +1,31 @@
+package com.itextpdf.io.font.otf;
+
+import com.itextpdf.test.annotations.type.UnitTest;
+import org.junit.Assert;
+import org.junit.Test;
+import org.junit.experimental.categories.Category;
+
+import java.util.ArrayList;
+import java.util.Arrays;
+
+@Category(UnitTest.class)
+public class GlyphLineTest {
+
+    @Test
+    public void testEquals() {
+        Glyph glyph = new Glyph(200, 200, 200);
+        GlyphLine.ActualText actualText = new GlyphLine.ActualText("-");
+
+        GlyphLine one = new GlyphLine(new ArrayList<Glyph>(Arrays.asList(glyph)), new ArrayList<GlyphLine.ActualText>(Arrays.asList(actualText)), 0, 1);
+        GlyphLine two = new GlyphLine(new ArrayList<Glyph>(Arrays.asList(glyph)), new ArrayList<GlyphLine.ActualText>(Arrays.asList(actualText)), 0, 1);
+
+        one.add(glyph);
+        two.add(glyph);
+
+        one.end++;
+        two.end++;
+
+        Assert.assertTrue(one.equals(two));
+    }
+
+}