fix bug when settings preview's position

MLPApi.py

@@ -81,7 +81,7 @@ def show_html(md_view, preview):
     # remove half of the viewport_extent.y to center it on the screen (verticaly)
     vector[1] -= preview.viewport_extent()[1] / 2
     # make sure the minimum is 0
-    vector[1] = 0 if vector < 0 else vector[1]
+    vector[1] = 0 if vector[1] < 0 else vector[1]
     # the hide the first line
     vector[1] += preview.line_height()
     preview.set_viewport_position(vector, animate=False)

sample.md

@@ -50,5 +50,3 @@ e
 s
 
 t
-
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