fix a minor issue

Author: zhengxwen

DESCRIPTION

@@ -1,8 +1,8 @@
 Package: SeqArray
 Type: Package
 Title: Big Data Management of Whole-genome Sequence Variant Calls
-Version: 1.11.17
-Date: 2016-03-25
+Version: 1.11.18
+Date: 2016-03-29
 Depends: R (>= 2.15.0), gdsfmt (>= 1.7.15)
 Imports: methods, S4Vectors, IRanges, GenomicRanges,
         SummarizedExperiment, Biostrings, VariantAnnotation

src/ConvGDS2VCF.cpp

@@ -634,14 +634,15 @@ COREARRAY_DLL_EXPORT SEXP SEQ_OutVCF4_Di_WrtFmt(SEXP X)
 	int *pAllele = INTEGER(phase);
 
 	// for-loop, genotypes
+	size_t offset = 0;
 	size_t n = _VCF4_NumSample;
 
 #ifdef __SSE2__
 
 	LineBuf_NeedSize(n*4 + 64);
 
 	// 32-byte alignment
-	size_t offset = (size_t)LinePtr & 0x1F;
+	offset = (size_t)LinePtr & 0x1F;
 	if (offset > 0)
 	{
 		offset = 32 - offset;