[PATCH] tests: Fix compilation error

[Snir Sheriber <ssheribe@xxxxxxxxxx>]

Fix compilation error due to -Werror=maybe-uninitialized:

  CC       test-display-base.o
test-display-base.c: In function 'do_wakeup':
test-display-base.c:579:13: error: 'update' may be used uninitialized...
             push_command(&update->ext);

Signed-off-by: Snir Sheriber <ssheribe@xxxxxxxxxx>
---
 server/tests/test-display-base.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/server/tests/test-display-base.c b/server/tests/test-display-base.c
index 8167df5..4053ae6 100644
--- a/server/tests/test-display-base.c
+++ b/server/tests/test-display-base.c
@@ -546,7 +546,7 @@ static void produce_command(Test *test)
         case SIMPLE_DRAW_SOLID:
         case SIMPLE_DRAW_BITMAP:
         case SIMPLE_DRAW: {
-            SimpleSpiceUpdate *update;
+            SimpleSpiceUpdate *update = NULL;
 
             if (has_automated_tests)
             {
@@ -576,7 +576,8 @@ static void produce_command(Test *test)
             default: /* Just to shut up GCC warning (-Wswitch) */
                 break;
             }
-            push_command(&update->ext);
+            if(update)
+                push_command(&update->ext);
             break;
         }
 
-- 
2.9.3

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