Be more explicit when catching the exception when doing the pyparsing

monkeypatch check.

Author: mdboom

lib/matplotlib/__init__.py

@@ -133,7 +133,7 @@ def compare_versions(a, b):
         f = pyparsing.Forward()
         f <<= pyparsing.Literal('a')
         bad_pyparsing = f is None
-    except:
+    except TypeError:
         bad_pyparsing = True
 
     # pyparsing 1.5.6 does not have <<= on the Forward class, but

setupext.py

@@ -998,7 +998,7 @@ def is_ok(self):
             f = pyparsing.Forward()
             f <<= pyparsing.Literal('a')
             return f is not None
-        except:
+        except TypeError:
             return False
 
     def check(self):