fixup! BUG: Handle sheetname deprecation directly

Author: TomAugspurger

pandas/io/excel.py

@@ -203,7 +203,7 @@ def read_excel(io, sheet_name=0, header=0, skiprows=None, skip_footer=0,
                squeeze=False, **kwds):
 
     # Can't use _deprecate_kwarg since sheetname=None has a special meaning
-    if sheet_name is 0 and 'sheetname' in kwds:
+    if is_integer(sheet_name) and sheet_name == 0 and 'sheetname' in kwds:
         # deprecation warning
         warnings.warn("The `sheetname` keyword is deprecated, use "
                       "`sheet_name` instead", FutureWarning)