Fixed Makefile of the yaml_stats example.

Fixed a bug in Node that caused an empty exception message.

dyaml/node.d

@@ -642,8 +642,8 @@ struct Node
                 auto idx = findPair(index);
                 if(idx >= 0){return get!(Pair[])[idx].value;}
 
-                throw new Error("Mapping index not found" ~ 
-                                isSomeString!T ? ": " ~ to!string(index) : "", startMark_);
+                string msg = "Mapping index not found" ~ (isSomeString!T ? ": " ~ to!string(index) : "");
+                throw new Error(msg, startMark_);
             }
             throw new Error("Trying to index node that does not support indexing", startMark_);
         }

examples/yaml_stats/Makefile

@@ -2,4 +2,4 @@ main:
 	dmd -w -I../../ -L-L../../ -L-ldyaml yaml_stats.d
 
 clean:
-	rm yaml_stats myaml_stats.o
+	rm yaml_stats yaml_stats.o