Close open cursor files

src_py/cursors.py

@@ -255,10 +255,19 @@ def bitswap(num):
             b = num&(1<<x) != 0
             val = val<<1 | b
         return val
-    if type(curs) is type(''): curs = open(curs)
-    if type(mask) is type(''): mask = open(mask)
-    curs = curs.readlines()
-    mask = mask.readlines()
+
+    if type(curs) is type(''):
+        with open(curs) as cursor_f:
+            curs = cursor_f.readlines()
+    else:
+        curs = curs.readlines()
+
+    if type(mask) is type(''):
+        with open(mask) as mask_f:
+            mask = mask_f.readlines()
+    else:
+        mask = mask.readlines()
+
     #avoid comments
     for line in range(len(curs)):
         if curs[line].startswith("#define"):