Added boolean operators to plUUID.

Sources/Plasma/NucleusLib/pnUUID/pnUUID.h

@@ -61,10 +61,10 @@ public:
     };
 
     plUUID();
-    plUUID( const char * s );
     plUUID(const plString& s);
     plUUID(const plUUID& other);
     plUUID(const Uuid& uuid);
+
     void     Clear();
     bool     IsNull() const;
     bool     IsSet() const { return !IsNull(); }
@@ -78,7 +78,9 @@ public:
     plString AsString() const;
     void     Read(hsStream* s);
     void     Write(hsStream* s);
-    operator plString ( void ) const { return AsString();}
+
+    operator bool () const { return !IsNull(); }
+    inline bool operator ! () const { return IsNull(); }
 
     bool operator==(const plUUID& other) const {
         return IsEqualTo(&other);
@@ -89,6 +91,7 @@ public:
     bool operator<(const plUUID& other) const {
         return CompareTo(&other) == -1;
     }
+    operator plString (void) const { return AsString(); }
     operator Uuid () const;
 
     static plUUID Generate();