glsl: handle format layout qualifiers for struct with array of images

This handles a situation like:

struct {
   layout (r32f) image2D imgs[6];
} s;

Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Timothy Arceri <tarceri@itsqueeze.com>

src/compiler/glsl/ast_to_hir.cpp

@@ -7434,7 +7434,8 @@ ast_process_struct_or_iface_block_members(exec_list *instructions,
 
             if (field_type->without_array()->is_image()) {
                if (qual->flags.q.explicit_image_format) {
-                  if (qual->image_base_type != field_type->sampled_type) {
+                  if (qual->image_base_type !=
+                      field_type->without_array()->sampled_type) {
                      _mesa_glsl_error(&loc, state, "format qualifier doesn't "
                                       "match the base data type of the image");
                   }