Add test for reading eddy with missing speed

See commit a86422ee.

Overlap/Tests/short_tests.json

@@ -557,5 +557,17 @@
 	    "$tests_old_dir/Graph_from_Matlab_v6_anti/edgelist.csv",
 	    "$tests_old_dir/Graph_from_Matlab_v6_anti/node_id_param.json"
 	]
+    },
+    {
+        "title": "Read_eddy_missing_speed",
+        "commands":
+	[
+            ["mkdir", "SHPC"],
+            [
+		"$build_dir/Overlap/Tests/test_read_eddy",
+		"$PWD/Inst_eddies_4_anti"
+	    ]
+        ],
+	"input": "&main_nml ishape = 330 /\n"
     }
 ]