fixed one test where the buffer is allowed to be None

pyopencl/cffi_cl.py

-#from pyopencl._cl import PooledBuffer, MemoryPool
+from pyopencl._cl import PooledBuffer, MemoryPool
 import warnings
 import np
 import ctypes
@@ -697,7 +697,10 @@ class Image(MemoryObject):
         if shape is None:
             raise LogicError("Image", status_code.INVALID_VALUE, "'shape' must be given")
 
-        c_buf, size, _ = _c_buffer_from_obj(buffer, writable=flags & mem_flags.USE_HOST_PTR)
+        if buffer is None:
+            c_buf, size = _ffi.NULL, 0
+        else:
+            c_buf, size, _ = _c_buffer_from_obj(buffer, writable=flags & mem_flags.USE_HOST_PTR)
                 
         dims = len(shape)
         if dims == 2:

test/test_wrapper.py

@@ -47,10 +47,13 @@ def test_get_info(ctx_factory):
     failure_count = [0]
 
     pocl_quirks = [
-            (cl.Buffer, cl.mem_info.OFFSET),
+        (cl.Buffer, cl.mem_info.OFFSET),
+    ]
+    if ctx._get_cl_version() >= (1, 2) and cl.get_cl_header_version() >= (1, 2):
+        pocl_quirks.extend([
             (cl.Program, cl.program_info.KERNEL_NAMES),
             (cl.Program, cl.program_info.NUM_KERNELS),
-            ]
+        ])
     CRASH_QUIRKS = [
             (("NVIDIA Corporation", "NVIDIA CUDA",
                 "OpenCL 1.0 CUDA 3.0.1"),