million game - only one hint to be used

src/main/quizproject.c

@@ -727,11 +727,14 @@ void play_milliongame() {
                     }
                     break;
                 case 'H':
-                    million_lifeline_hint = 0;
-                    printf("Hint would be displayed here\n");
-
-                    goto point_one;
-
+                    if(million_lifeline_hint != 1){
+                        printf("\nHint already used\n");
+                        goto point_one;
+                    } else {
+                        million_lifeline_hint = 0;
+                        printf("Hint would be displayed here\n");
+                        goto point_one;
+                    }
                     break;
                 case 'F':
                     million_lifeline_delete = 0;