* Check that a caca_figfont was loaded before using it in caca_put_figchar()

caca/figfont.c

@@ -132,6 +132,9 @@ int caca_put_figchar(caca_canvas_t *cv, uint32_t ch)
     caca_figfont_t *ff = cv->ff;
     int c, w, h, x, y, overlap, extra, xleft, xright;
 
+    if (!ff) 
+        return -1;
+
     switch(ch)
     {
         case (uint32_t)'\r':