fix Path::ext() when new_ext == ""

src/lib/src/Path.cc

@@ -58,7 +58,11 @@ namespace jes
             }
             i--;
         }
-        if (new_ext[0] == '.')
+        if (new_ext.size() == 0)
+        {
+            return new Path(std::string(m_path, 0, i));
+        }
+        else if (new_ext[0] == '.')
         {
             return new Path(std::string(m_path, 0, i) + new_ext);
         }