src/tree.c: Fix missing "static" qualifier

Fixes:

      CC       src/marquee-tree.o
    src/tree.c:251:1: warning: no previous prototype for ‘seek’ [-Wmissing-prototypes]
     seek(MqTree *node, gint offset)
     ^

1 files changed, 1 insertions, 1 deletions

diff --git a/src/tree.c b/src/tree.c
index 8d6fee5..64d7230 100644
--- a/src/tree.c
+++ b/src/tree.c
@@ -247,7 +247,7 @@ mq_tree_remove_allocated(MqTree *node)
 	debug_print_tree("Removed node", node);
 }
 
-MqTree *
+static MqTree *
 seek(MqTree *node, gint offset)
 {
 	/* Skip forward to the containing subtree. */