fix indizes

src/display.c

@@ -23,7 +23,7 @@ void cleanup_display() {
 	uint32_t height;	// normally 25, may vary
 	char *image;		// dimension is width x height
 */
-void print_current_image(struct message* msg, int start, int end) {
+static void print_current_image(const struct message* msg, int start, int end) {
 	end = 80; // end is ignored and 80 is used, should be handled properly later
 
 	//move(0,0); // start in the upper left corner
@@ -31,12 +31,11 @@ void print_current_image(struct message* msg, int start, int end) {
 	
 	for (int row=0; row < 25; row++) { // iterate over rows
 		char *original_line = pic + row * msg->width; // pointer to the start of the line to print
-		char *line = (char*) malloc(end+1); // allocate a line because we modify it
+		char *line = (char*) malloc(end-start+1); // allocate a line because we modify it
 		strcpy(line, original_line + start); // get a line from the right start
-		line[end] = '\0'; // terminate it
+		line[end-start] = '\0'; // terminate it
 
 		mvprintw(row, 0, "%s", line); // print it
-		
 		free(line); // free it
 	}
 	
@@ -44,8 +43,13 @@ void print_current_image(struct message* msg, int start, int end) {
 
 }
 
-
 void callback(const struct message *msg) {
 	printf("in callback, tst=%d\n", msg->timestamp);
+	
+	int start;
+	
+	
+	print_current_image(msg, start, start+80);
+	
 }