replace wrong variable with the correct one

Author: NimaSarajpoor

stumpy/gpu_aamp.py

@@ -304,7 +304,7 @@ def _gpu_aamp(
     See Table II, Figure 5, and Figure 6
     """
     threads_per_block = config.STUMPY_THREADS_PER_BLOCK
-    blocks_per_grid = math.ceil(k / threads_per_block)
+    blocks_per_grid = math.ceil(w / threads_per_block)
 
     T_A = np.load(T_A_fname, allow_pickle=False)
     T_B = np.load(T_B_fname, allow_pickle=False)