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-rw-r--r--src/glsl/apps/tokenise.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/glsl/apps/tokenise.c b/src/glsl/apps/tokenise.c
index c70c3ccbb1..b4c6d60930 100644
--- a/src/glsl/apps/tokenise.c
+++ b/src/glsl/apps/tokenise.c
@@ -57,6 +57,7 @@ main(int argc,
fseek(in, 0, SEEK_END);
size = ftell(in);
+ assert(size != -1);
fseek(in, 0, SEEK_SET);
out = fopen(argv[2], "wb");