Env iteration error on Win7

[aviks]

julia> versioninfo(true)
Julia Version 0.3.0-prerelease+1552
Commit 8259c27* (2014-02-12 23:44 UTC)
Platform Info:
  System: Windows (x86_64-w64-mingw32)
  CPU: Intel(R) Core(TM)2 Duo CPU     P7350  @ 2.00GHz
  WORD_SIZE: 64
           Microsoft Windows [Version 6.1.7601]
  uname: MINGW32_NT-6.1 1.0.12(0.46/3/2) 2011-07-20 17:52 i686 unknown
Memory: 3.726531982421875 GB (2046.7109375 MB free)
Uptime: 13596.5052003 sec
Load Avg:  0.0  0.0  0.0
Intel(R) Core(TM)2 Duo CPU     P7350  @ 2.00GHz:
       speed         user       nice        sys       idle        irq ticks
#1  1990 MHz     887396          0    1286945   11423438      21886 ticks
#2  1990 MHz     624222          0     605595   12366682       2636 ticks

  BLAS: libopenblas (USE64BITINT DYNAMIC_ARCH NO_AFFINITY)
  LAPACK: libopenblas
  LIBM: libopenlibm
Environment:
ERROR: i not defined
 in next at env.jl:127

Looking at the code, it looks like its due to
088a087

cc @mauro3

This has also been reported in JuliaGraphics/Cairo.jl#61

[JeffBezanson]

The fix looked obvious, but @mauro3 please confirm.

[Keno]

Probably should add tests for this regression.