fixed a typo preventing [2J from working

module/nvt100.lua

@@ -97,7 +97,7 @@ function vt100emu(gpu) -- takes GPU component proxy *gpu* and returns a function
      elseif cc == "J" and tA[1] == 1 then
       gpu.fill(1,1,mx,cy," ")
      elseif cc == "J" and tA[1] == 2 then
-      gpu.full(1,1,mx,my," ")
+      gpu.fill(1,1,mx,my," ")
       cx, cy = 1, 1
      elseif cc == "J" then
       gpu.fill(1,cy,mx,my," ")