[PATCH 2/2] MINOR: zlib: fix potential uninitialized variable when freeing zlib

[Cyril Bonté]

The compiler emits a warning on free_zlib(), due to the "pool" variable that
can be used unitialized. We now initialize the variable and test its value to
remove this warning.
---
 src/compression.c |   10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/src/compression.c b/src/compression.c
index e8a3fe1..45f5078 100644
--- a/src/compression.c
+++ b/src/compression.c
@@ -392,7 +392,7 @@ end:
 static void free_zlib(void *opaque, void *ptr)
 {
        struct comp_ctx *ctx = opaque;
-       struct pool_head *pool;
+       struct pool_head *pool = NULL;
 
        if (ptr == ctx->zlib_window)
                pool = zlib_pool_window;
@@ -405,9 +405,11 @@ static void free_zlib(void *opaque, void *ptr)
        else if (ptr == ctx->zlib_pending_buf)
                pool = zlib_pool_pending_buf;
 
-       pool_free2(pool, ptr);
-       if (global.maxzlibmem > 0)
-               zlib_memory_available += pool->size;
+       if (pool != NULL) {
+               pool_free2(pool, ptr);
+               if (global.maxzlibmem > 0)
+                       zlib_memory_available += pool->size;
+       }
 }
 
 
-- 
1.7.10.4