removed LZ4_stream_t alignment test on Visual

it fails on x86 32-bit mode :
Visual reports an alignment of 8-bytes (even with alignof())
but actually only align LZ4_stream_t on 4 bytes.
The alignment check then fails, resulting in missed initialization.

1 files changed, 8 insertions, 0 deletions

diff --git a/lib/lz4.c b/lib/lz4.c
index a2e58c0..04a30e7 100644
--- a/lib/lz4.c
+++ b/lib/lz4.c
@@ -1284,17 +1284,25 @@ LZ4_stream_t* LZ4_createStream(void)
     return lz4s;
 }
 
+#ifndef _MSC_VER  /* for some reason, Visual fails the aligment test on 32-bit x86 :
+                     it reports an aligment of 8-bytes,
+                     while actually aligning LZ4_stream_t on 4 bytes. */
 static size_t LZ4_stream_t_alignment(void)
 {
     struct { char c; LZ4_stream_t t; } t_a;
     return sizeof(t_a) - sizeof(t_a.t);
 }
+#endif
 
 LZ4_stream_t* LZ4_initStream (void* buffer, size_t size)
 {
     DEBUGLOG(5, "LZ4_initStream");
     if (size < sizeof(LZ4_stream_t)) return NULL;
+#ifndef _MSC_VER  /* for some reason, Visual fails the aligment test on 32-bit x86 :
+                     it reports an aligment of 8-bytes,
+                     while actually aligning LZ4_stream_t on 4 bytes. */
     if (((size_t)buffer) & (LZ4_stream_t_alignment() - 1)) return NULL;  /* alignment check */
+#endif
     MEM_INIT(buffer, 0, sizeof(LZ4_stream_t));
     return (LZ4_stream_t*)buffer;
 }