Fix casting error in contrib/testzlib/testzlib.c.
diff --git a/contrib/testzlib/testzlib.c b/contrib/testzlib/testzlib.c
index 135888e..5f659de 100644
--- a/contrib/testzlib/testzlib.c
+++ b/contrib/testzlib/testzlib.c
@@ -116,10 +116,10 @@
     return dwRet;

 }

 

-int ReadFileMemory(const char* filename,long* plFileSize,void** pFilePtr)

+int ReadFileMemory(const char* filename,long* plFileSize,unsigned char** pFilePtr)

 {

     FILE* stream;

-    void* ptr;

+    unsigned char* ptr;

     int retVal=1;

     stream=fopen(filename, "rb");

     if (stream==NULL)