Change wrong wait_sem to post_sem to avoid deadlock

generator.c

@@ -229,14 +229,14 @@ void putSolution(int *solution)
 		wait_sem(sFreeSpace);
 		shared->data[shared->tail] = -1;
 		shared->tail = (shared->tail + 1) % CIRC_BUF_SIZE;
-		wait_sem(sUsedSpace);
+		sem_post(sUsedSpace);
 	} else {
 		int i = 0;
 		while (solution[i] != -1) {
 			wait_sem(sFreeSpace);
 			shared->data[shared->tail] = solution[i];
 			shared->tail = (shared->tail + 1) % CIRC_BUF_SIZE;
-			wait_sem(sUsedSpace);
+			sem_post(sUsedSpace);
 			i++;
 		}
 	}