[C, committed] Minor cleanup in grokfield

[Marek Polacek]

No need to use a dedicated variable if we can use RECORD_OR_UNION_TYPE_P
directly and only once.

Bootstrapped/regtested on x86_64-linux, applying to trunk.

2017-07-25  Marek Polacek  <pola...@redhat.com>

        * c-decl.c (grokfield): Remove local variable.

diff --git gcc/c/c-decl.c gcc/c/c-decl.c
index 50da185e363..12fbc18bb94 100644
--- gcc/c/c-decl.c
+++ gcc/c/c-decl.c
@@ -7559,10 +7559,9 @@ grokfield (location_t loc,
         that took root before someone noticed the bug...  */
 
       tree type = declspecs->type;
-      bool type_ok = RECORD_OR_UNION_TYPE_P (type);
       bool ok = false;
 
-      if (type_ok
+      if (RECORD_OR_UNION_TYPE_P (type)
          && (flag_ms_extensions
              || flag_plan9_extensions
              || !declspecs->typedef_p))

        Marek