TEST: Fix error tests to use dtype

Author: ubaidsk

tests/errors/bindc_04.py

@@ -1,23 +1,23 @@
 from lpython import CPtr, i32, Pointer, i16
-from numpy import empty, int32
+from numpy import empty, int16
 
 def fill_A(k: i32, n: i32) -> None:
-    A: i16[n*k] = empty(n*k, dtype=int32)
+    A: i16[n*k] = empty(n*k, dtype=int16)
     i: i32; j: i32
     for j in range(k):
         for i in range(n):
             A[j*n+i] = i16((i+j))
 
 def fill_B(k: i32, n: i32) -> None:
-    B: i16[k*n] = empty(k*n, dtype=int32)
+    B: i16[k*n] = empty(k*n, dtype=int16)
     i: i32; j: i32
     for j in range(k):
         for i in range(n):
             B[j*n+i] = i16((i+j))
 
 def fill_C(k: i32, n: i32, b: CPtr) -> None:
     nk: i32 = n * k
-    C: i16[nk] = empty(nk, dtype=int32)
+    C: i16[nk] = empty(nk, dtype=int16)
     i: i32; j: i32
     for j in range(k):
         for i in range(n):