Update main.c only use gps in FM modes

main.c

@@ -332,7 +332,10 @@ int main(int argc, char * argv[]) {
 	
 	cmdbuffer[0] = '\0';
 	gps_status = OFF;
-	FILE *gps_read = sopen("python3 /home/pi/CubeSatSim/gps_client.py");  // python sensor polling function	  
+	FILE *gps_read = NULL;
+	if ((mode == AFSK) || (mode == CW) || mode == SSTV)) 
+	{
+		gps_read = sopen("python3 /home/pi/CubeSatSim/gps_client.py");  // python sensor polling function	  
 	
 		if (gps_read != NULL) {
 	    	fgets(cmdbuffer, 1000, gps_read);
@@ -345,9 +348,10 @@ int main(int argc, char * argv[]) {
 				gps_status = ON;
 				fprintf(stderr, "Pi GPS on\n");
 			}
-//		fclose(gps_read);
+	//		fclose(gps_read);
 		} else
 			fprintf(stderr, "Error checking gps");
+	}
 	
     payload = OFF;