Merge pull request #657 from mrava87/bug-conv1d

bug: fix pad in convolve1d to work with cupy

Author: mrava87

pylops/signalprocessing/convolve1d.py

@@ -144,11 +144,11 @@ def __init__(
             self.offset -= 1
         self.hstar = ncp.flip(self.h, axis=-1)
 
-        self.pad = ncp.zeros((len(dims), 2), dtype=int)
+        self.pad = np.zeros((len(dims), 2), dtype=int)
         self.pad[self.axis, 0] = max(self.offset, 0)
         self.pad[self.axis, 1] = -min(self.offset, 0)
 
-        self.padd = ncp.zeros((len(dims), 2), dtype=int)
+        self.padd = np.zeros((len(dims), 2), dtype=int)
         self.padd[self.axis, 1] = max(self.offset, 0)
         self.padd[self.axis, 0] = -min(self.offset, 0)