Gaussian Pyramid bug fix

- CLANG warning showing that the sizeof(float) didn't match the double
  float size of the variable.
- Changing it to the variable name of index 0 so that this doesn't happen
  in future.
diff --git a/test_conformance/test_gaussianpyramid.c b/test_conformance/test_gaussianpyramid.c
index dce0aa0..bb51e10 100644
--- a/test_conformance/test_gaussianpyramid.c
+++ b/test_conformance/test_gaussianpyramid.c
@@ -317,7 +317,7 @@
     vx_uint32 ref_width = input->width;
     vx_uint32 ref_height = input->height;
 
-    ASSERT(input && pyr && (1 < levels) && (level < sizeof(c_orbscale) / sizeof(float) ));
+    ASSERT(input && pyr && (1 < levels) && (level < sizeof(c_orbscale) / sizeof(c_orbscale[0]) ));
     ASSERT_VX_OBJECT(output_image = vxGetPyramidLevel(pyr, 0), VX_TYPE_IMAGE);
     ASSERT_NO_FAILURE(output_prev = ct_image_from_vx_image(output_image));
     VX_CALL(vxReleaseImage(&output_image));
@@ -405,7 +405,7 @@
     vx_uint32 dst_height = input->height;
 
     ASSERT_(return NULL, scale < 1.0);
-    ASSERT_(return NULL, input && (level < (sizeof(c_orbscale) / sizeof(float))));
+    ASSERT_(return NULL, input && (level < (sizeof(c_orbscale) / sizeof(c_orbscale[0]))));
 
     ASSERT_(return NULL, input->format == VX_DF_IMAGE_U8);
 
@@ -457,7 +457,7 @@
     vx_uint32 ref_width    = input->width;
     vx_uint32 ref_height   = input->height;
 
-    ASSERT(input && pyr && (levels < sizeof(c_orbscale) / sizeof(float) ));
+    ASSERT(input && pyr && (levels < sizeof(c_orbscale) / sizeof(c_orbscale[0]) ));
     ASSERT_VX_OBJECT(output_image = vxGetPyramidLevel(pyr, 0), VX_TYPE_IMAGE);
     ASSERT_NO_FAILURE(output_prev = ct_image_from_vx_image(output_image));