Fix behavior for svg containing elements with zero or negative stroke-width

DEVSIX-6270

Autoported commit.
Original commit hash: [1ffa4d507]

Author: AnhelinaM

itext.tests/itext.svg.tests/itext/svg/renderers/StrokeTest.cs

@@ -100,6 +100,16 @@ public virtual void StrokeAttributesTest() {
             ConvertAndCompare(SOURCE_FOLDER, DESTINATION_FOLDER, "stroke-attributes");
         }
 
+        [NUnit.Framework.Test]
+        public virtual void ZeroStrokeWidthTest() {
+            ConvertAndCompareSinglePage(SOURCE_FOLDER, DESTINATION_FOLDER, "zeroStrokeWidth");
+        }
+
+        [NUnit.Framework.Test]
+        public virtual void NegativeStrokeWidthTest() {
+            ConvertAndCompareSinglePage(SOURCE_FOLDER, DESTINATION_FOLDER, "negativeStrokeWidth");
+        }
+
         [NUnit.Framework.Test]
         public virtual void HeightWidthZeroTest() {
             ConvertAndCompareSinglePage(SOURCE_FOLDER, DESTINATION_FOLDER, "heightWidthZero");