Add missing type declaration (#1520)

Add a missing type declaration to OpenCL C code strings in 2D async copy
tests.

1 files changed, 1 insertions, 1 deletions

diff --git a/test_conformance/basic/test_async_copy2D.cpp b/test_conformance/basic/test_async_copy2D.cpp
index 54633a31..bf3f1552 100644
--- a/test_conformance/basic/test_async_copy2D.cpp
+++ b/test_conformance/basic/test_async_copy2D.cpp
@@ -53,7 +53,7 @@ __kernel void test_fn(const __global %s *src, __global %s *dst,
 
   for (int i = 0; i < lineCopiesPerWorkItem; i++) {
     for (int j = 0; j < numElementsPerLine; j++) {
-      const local_index = (get_local_id(0) * lineCopiesPerWorkItem + i) * dstStride + j;
+      const int local_index = (get_local_id(0) * lineCopiesPerWorkItem + i) * dstStride + j;
       const int global_index = (get_global_id(0) * lineCopiesPerWorkItem + i) * dstStride + j;
       dst[global_index] = localBuffer[local_index];
     }