v0.7.3a: added a sync check to script resetting

SPD-classes/src/main/java/com/watabou/glscripts/Script.java

@@ -63,7 +63,7 @@ public class Script extends Program {
 		return (T)curScript;
 	}
 	
-	public static void reset() {
+	public synchronized static void reset() {
 		for (Script script:all.values()) {
 			script.delete();
 		}