Moved curses from top-level import to function-level import and added a

comment why that is necessary

utils/decodeMasterMACStatusR10.py

@@ -1,7 +1,5 @@
 #!/usr/bin/env python3
 
-import curses
-
 # List of tuples which encodes the states given in the file description.
 # Index first with the bit index, then with the bit value
 interpretation = [
@@ -42,6 +40,13 @@ def print_decoded(bit_list, interpreted):
         print(f"Bit {idx} = {bit_value}: {msg}")
 
 def interactive():
+
+    # Imported here, because curses is not available in Windows. Using the 
+    # interactive mode therefore fails on Windows, but at least the single 
+    # command mode can be used (which would not be possible if we would import
+    # curses at the top level)
+    import curses
+
     stdscr = curses.initscr()
     curses.noecho()
     curses.cbreak()