[Mesa-dev] [PATCH] fix gcc 8 parenthesis warning

[Marc Dietrich]

fixes warnings like this:
[184/1137] Compiling C++ object 'src/compiler/glsl/glsl at sta/lower_jumps.cpp.o'.
In file included from ../src/mesa/main/mtypes.h:48,
                 from ../src/compiler/glsl_types.h:149,
                 from ../src/compiler/glsl/lower_jumps.cpp:59:
../src/compiler/glsl/lower_jumps.cpp: In member function '{anonymous}::block_record {anonymous}::ir_lower_jumps_visitor::visit_block(exec_list*)':
../src/compiler/glsl/list.h:650:17: warning: unnecessary parentheses in declaration of 'node' [-Wparentheses]
    for (__type *(__inst) = (__type *)(__list)->head_sentinel.next; \
                 ^
../src/compiler/glsl/lower_jumps.cpp:510:7: note: in expansion of macro 'foreach_in_list'
       foreach_in_list(ir_instruction, node, list) {
       ^~~~~~~~~~~~~~~

Signed-off-by: Marc Dietrich <marvin24 at gmx.de>
---
 src/compiler/glsl/list.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/compiler/glsl/list.h b/src/compiler/glsl/list.h
index f77fe12991..2bfa273554 100644
--- a/src/compiler/glsl/list.h
+++ b/src/compiler/glsl/list.h
@@ -647,12 +647,12 @@ inline void exec_node::insert_before(exec_list *before)
 #endif
 
 #define foreach_in_list(__type, __inst, __list)      \
-   for (__type *(__inst) = (__type *)(__list)->head_sentinel.next; \
+   for (__type *__inst = (__type *)(__list)->head_sentinel.next; \
         !(__inst)->is_tail_sentinel();               \
         (__inst) = (__type *)(__inst)->next)
 
 #define foreach_in_list_reverse(__type, __inst, __list)   \
-   for (__type *(__inst) = (__type *)(__list)->tail_sentinel.prev; \
+   for (__type *__inst = (__type *)(__list)->tail_sentinel.prev; \
         !(__inst)->is_head_sentinel();                    \
         (__inst) = (__type *)(__inst)->prev)
 
-- 
2.16.2