Added MusicEntry.Equals, HasFilePath

Some convenience methods for checking path name equality.  Two
MusicEntry handles are equal if they refer to the same music path.

scripting/include/round_end_music.inc

@@ -39,6 +39,20 @@ methodmap MusicEntry < KeyValues {
 	public void GetSource(char[] buffer, int maxlen) {
 		this.GetString("source", buffer, maxlen);
 	}
+	
+	public bool HasFilePath(const char[] filePath) {
+		char thisFilePath[PLATFORM_MAX_PATH];
+		this.GetFilePath(thisFilePath, sizeof(thisFilePath));
+		
+		return StrEqual(thisFilePath, filePath);
+	}
+	
+	public bool Equals(MusicEntry other) {
+		char otherFilePath[PLATFORM_MAX_PATH];
+		other.GetFilePath(otherFilePath, sizeof(otherFilePath));
+		
+		return this.HasFilePath(otherFilePath);
+	}
 }
 
 typedef OnSongsRequested = function void ();