Use slice pitch instead of row pitch for 1D arrays. (#314)

Fixes fill_image 1Darray

test_conformance/images/clFillImage/test_fill_generic.cpp

diff --git a/test_conformance/images/clFillImage/test_fill_generic.cpp b/test_conformance/images/clFillImage/test_fill_generic.cpp
index c98c2ad..bb378d1 100644
--- a/test_conformance/images/clFillImage/test_fill_generic.cpp
+++ b/test_conformance/images/clFillImage/test_fill_generic.cpp
@@ -194,12 +194,26 @@
     }
     else {
         // Else copy one scan line at a time.
+        size_t dstPitch2D = 0;
+        switch (imageInfo->type)
+        {
+            case CL_MEM_OBJECT_IMAGE3D:
+            case CL_MEM_OBJECT_IMAGE2D_ARRAY:
+            case CL_MEM_OBJECT_IMAGE2D:
+                dstPitch2D = mappedRow;
+                break;
+            case CL_MEM_OBJECT_IMAGE1D_ARRAY:
+            case CL_MEM_OBJECT_IMAGE1D:
+                dstPitch2D = mappedSlice;
+                break;
+        }
+
         for ( size_t z = 0; z < depth; z++ )
         {
             for ( size_t y = 0; y < height; y++ )
             {
                 memcpy( dst, src, imageInfo->width * get_pixel_size(imageInfo->format) );
-                dst += mappedRow;
+                dst += dstPitch2D;
                 src += scanlineSize;
             }
 
@@ -531,6 +545,9 @@
 
             total_matched += scanlineSize;
             sourcePtr += imageInfo->rowPitch;
+            if((imageInfo->type == CL_MEM_OBJECT_IMAGE1D_ARRAY || imageInfo->type == CL_MEM_OBJECT_IMAGE1D))
+            destPtr += mappedSlice;
+            else
             destPtr += mappedRow;
         }