All decompress functions used after this check take into account that
encoder->palette is not NULL. So, if we already detected that the
palette is NULL, let's just return early.
---
 common/lz.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/common/lz.c b/common/lz.c
index d1c4033..2589223 100644
--- a/common/lz.c
+++ b/common/lz.c
@@ -647,6 +647,7 @@ void lz_decode(LzContext *lz, LzImageType to_type, uint8_t 
*buf)
             if (!encoder->palette) {
                 encoder->usr->error(encoder->usr,
                                     "a palette is missing (for bpp to rgb 
decoding)\n");
+                return;
             }
             switch (encoder->type) {
             case LZ_IMAGE_TYPE_PLT1_BE:
-- 
2.7.3

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