small fix

Author: Ellipse0934

REQUIRE

@@ -0,0 +1,3 @@
+julia 0.6
+ColorTypes
+FixedPointNumbers

src/ioctl.jl

@@ -25,7 +25,7 @@ function ioctl(fd::Cint, request::Integer, arg::Integer)
     return ret
 end
 function ioctl(fd::Cint, request::Integer, arg)
-    ret = ccall(:ioctl, Cint, (Cint, Culong, Ptr{Nothing}...), fd, request, arg)
+    ret = ccall(:ioctl, Cint, (Cint, Culong, Ptr{Cvoid}...), fd, request, arg)
     if ret < 0
         throw(SystemError("ioctl error"))
     end

test/sensors.jl

@@ -3,4 +3,4 @@ using SenseHat
 
 @test -40 <= temperature() <= 60
 @test 0 <= humidity() <= 100
-@test 950 <= pressure() <= 1100
+@test 900 <= pressure() <= 1200