Launching headless should auto-disable CrashReporter.

Despite the !GraphicsEnvironment.isHeadess() in the catch block the CR would still pop up - maybe from the system not being headless *incapable* even if the game ran headless

Author: Cervator

facades/PC/src/main/java/org/terasology/engine/Terasology.java

@@ -73,6 +73,7 @@ public static void main(String[] args) {
                     homePath = Paths.get("");
                 } else if (arg.equals(HEADLESS_ARG)) {
                     isHeadless = true;
+                    crashReportEnabled = false;
                 } else if (arg.equals(NO_CRASH_REPORT_ARG)) {
                     crashReportEnabled = false;
                 } else if (arg.equals(LOAD_LAST_GAME_ARG)) {