fix: Type error at interface

* Cast to signed

hdl/top_corr_matrix.vhd

@@ -322,7 +322,7 @@ begin
         alpha           => C_ALPHA_CC,
 
         -- Signal input
-        sig_data        => ser_tdata(C_W_COR-1 downto 0),
+        sig_data        => signed(ser_tdata(C_W_COR-1 downto 0)),
         sig_id          => ser_tdata(C_W_PSCID+C_W_COR-1 downto C_W_COR),
         sig_valid       => ser_tvalid,