Change message when libpng pkg-config lookup fails

mdboom · mdboom · commit 620117ffc05d · 2013-05-06T14:24:20.000-04:00
diff --git a/setupext.py b/setupext.py
@@ -803,7 +803,7 @@ def check(self):
                 min_version='1.2')
         except CheckFailed as e:
             self.__class__.found_external = False
-            return str(e) + ' Using local copy.'
+            return str(e) + ' Using unknown version.'
 
     def get_extension(self):
         sources = [
