compiler: fix linearization padding check

Author: mloubout

devito/passes/iet/linearization.py

@@ -71,14 +71,8 @@ def key1(f, d):
         # For paddable objects the following holds:
         # `same dim + same halo + same padding_dtype => same (auto-)padding`
         if d is f.dimensions[-1]:
-            # Only the last dimension is padded
             try:
-                if f.padding == f.mapped.padding:
-                    # Padding set from the mapped Function
-                    # e.g. from buffering or fft temp array
-                    pad_key = f.mapped.__padding_dtype__
-                else:
-                    pad_key = f.__padding_dtype__
+                pad_key = f.mapped.__padding_dtype__
             except AttributeError:
                 pad_key = f.__padding_dtype__
         else: