Clarify conditions to avoid compiler errors

Fix errors pointed out by clang

error: logical not is only applied to the left hand side of this bitwise operator [-Werror,-Wlogical-not-parentheses]
|         if (only_immutable && !copy->flags[i] & FLAG_IMMUTABLE) continue;
|                               ^

Signed-off-by: Khem Raj <raj.khem@gmail.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/tracks.c b/tracks.c
index 5b27350..ca44ce1 100644
--- a/tracks.c
+++ b/tracks.c
@@ -1072,7 +1072,7 @@ static int solve_check_single_sub(game_state *state, int si, int id, int n,
         x = i%w;
         y = i/w;
         if (abs(ox-x) > 1 || abs(oy-y) > 1) {
-            if (!state->sflags[i] & S_TRACK)
+            if (!(state->sflags[i] & S_TRACK))
                 did += solve_set_sflag(state, x, y, S_NOTRACK, what);
         }
     }