Check for totalLines to be 0 in CoverageSummary.

Author: jeankedotcom

src/coverlet.core/CoverageSummary.cs

@@ -32,7 +32,7 @@ public CoverageSummaryResult CalculateSummary()
                     }
                 }
 
-                result.Add(System.IO.Path.GetFileNameWithoutExtension(mod.Key), (linesCovered * 100) / totalLines);
+                result.Add(System.IO.Path.GetFileNameWithoutExtension(mod.Key), totalLines == 0 ? totalLines : (linesCovered * 100) / totalLines);
             }
 
             return result;