"Merge pull request #437 from johnwheeler/master\n\nmax_debug_level =…

… None for Autoprefixer filters #436"

src/webassets/filter/autoprefixer.py

@@ -42,6 +42,8 @@ class AutoprefixerFilter(ExternalTool):
         'extra_args': 'AUTOPREFIXER_EXTRA_ARGS',
     }
 
+    max_debug_level = None
+
     def input(self, in_, out, source_path, **kw):
         # Set working directory to the source file so that includes are found
         args = [self.autoprefixer or 'autoprefixer']
@@ -66,6 +68,8 @@ class Autoprefixer6Filter(AutoprefixerFilter):
 
     _postcss_autoprefixer = ['-u', 'autoprefixer']
 
+    max_debug_level = None    
+
     def input(self, in_, out, source_path, **kw):
         # Set working directory to the source file so that includes are found
         args = [self.autoprefixer or 'postcss']
@@ -78,4 +82,4 @@ def input(self, in_, out, source_path, **kw):
         if self.extra_args:
             args.extend(self.extra_args)
         with working_directory(filename=source_path):
-            self.subprocess(args, out, in_)
+            self.subprocess(args, out, in_)