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-rw-r--r--src/glsl/apps/process.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/glsl/apps/process.c b/src/glsl/apps/process.c
index e65f35cc00..c8a1a1868c 100644
--- a/src/glsl/apps/process.c
+++ b/src/glsl/apps/process.c
@@ -58,6 +58,7 @@ main(int argc,
fseek(in, 0, SEEK_END);
size = ftell(in);
+ assert(size != -1);
fseek(in, 0, SEEK_SET);
out = fopen(argv[2], "wb");