[PATCH] plugins: fix -Werror=maybe-uninitialized false-positive

[marcandre . lureau]

From: Marc-André Lureau <marcandre.lureau@redhat.com>

../contrib/plugins/cache.c:638:9: error: ‘l2_cache’ may be used uninitialized 
[-Werror=maybe-uninitialized]
  638 |         append_stats_line(rep, l1_dmem_accesses, l1_dmisses,
      |         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Is a false-positive, since cores > 1, so the variable is set in the
above loop.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
---
 contrib/plugins/cache.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/contrib/plugins/cache.c b/contrib/plugins/cache.c
index 512ef6776b..c2c274cfcd 100644
--- a/contrib/plugins/cache.c
+++ b/contrib/plugins/cache.c
@@ -609,7 +609,7 @@ static int l2_cmp(gconstpointer a, gconstpointer b)
 static void log_stats(void)
 {
     int i;
-    Cache *icache, *dcache, *l2_cache;
+    Cache *icache, *dcache, *l2_cache = NULL;
 
     g_autoptr(GString) rep = g_string_new("core #, data accesses, data misses,"
                                           " dmiss rate, insn accesses,"
-- 
2.47.0