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-rw-r--r--src/common/grfio.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/common/grfio.c b/src/common/grfio.c
index 41e6864ae..aa677a0e5 100644
--- a/src/common/grfio.c
+++ b/src/common/grfio.c
@@ -68,7 +68,7 @@ typedef struct {
char type;
char fn[128-4*5]; // file name
char *fnd;
- char gentry; // read grf file select
+ signed char gentry; // read grf file select
} FILELIST;
//gentry ... 0 : It acquires from a local file.
// It acquires from the resource file of 1>=:gentry_table[gentry-1].