Hi,

I have a VCF with no info columns, and info(vcf) returns:
DataFrame with 0 rows and 0 columns

This should probably be N rows, 0 columns. That bug makes expand(vcf) break
like this:

Error in icol[idx, ] :
  selecting rows: subscript contains NAs or out of bounds indices

Thanks,
Michael

> sessionInfo()
R Under development (unstable) (2013-03-27 r62427)
Platform: x86_64-unknown-linux-gnu (64-bit)

locale:
 [1] LC_CTYPE=en_US.UTF-8       LC_NUMERIC=C
 [3] LC_TIME=en_US.UTF-8        LC_COLLATE=en_US.UTF-8
 [5] LC_MONETARY=en_US.UTF-8    LC_MESSAGES=en_US.UTF-8
 [7] LC_PAPER=C                 LC_NAME=C
 [9] LC_ADDRESS=C               LC_TELEPHONE=C
[11] LC_MEASUREMENT=en_US.UTF-8 LC_IDENTIFICATION=C

attached base packages:
[1] parallel  stats     graphics  grDevices utils     datasets  methods
[8] base

other attached packages:
[1] VariantTools_1.3.0       VariantAnnotation_1.5.45
Rsamtools_1.11.27
[4] Biostrings_2.27.13       GenomicRanges_1.11.42
IRanges_1.17.41
[7] BiocGenerics_0.5.6       rjson_0.2.12

loaded via a namespace (and not attached):
 [1] AnnotationDbi_1.21.16   Biobase_2.19.3          biomaRt_2.15.1
 [4] bitops_1.0-5            BSgenome_1.27.1         DBI_0.2-5
 [7] GenomicFeatures_1.11.16 gmapR_1.1.16            graph_1.37.7
[10] grid_3.1.0              lattice_0.20-15         Matrix_1.0-12
[13] RBGL_1.35.0             RCurl_1.95-4.1          RSQLite_0.11.2
[16] rtracklayer_1.19.11     stats4_3.1.0            tools_3.1.0
[19] XML_3.96-0.2            zlibbioc_1.5.0

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