[CHERRY-PICK] DebugMacroCheck: Do not show progress bar with zero items

In the case that the total provided to the `_show_progress()`
function is zero, do not show a progress bar to prevent aborts
`ZeroDivisionError` when calculating the progress percentage.

Signed-off-by: Michael Kubacki <[email protected]>
(cherry picked from commit 67df979)

Author: makubacki

BaseTools/Plugin/DebugMacroCheck/DebugMacroCheck.py

@@ -577,6 +577,9 @@ def _show_progress(step: int, total: int, suffix: str = '') -> None:
     """
     global _progress_start_time
 
+    if total == 0:
+        return
+
     if step == 0:
         _progress_start_time = timeit.default_timer()