Merge pull request #52 from Gustav-Simonsson/fixes_for_linux_and_windows_builds

Fixes for linux and windows builds

io.h

@@ -50,7 +50,7 @@ enum ethash_io_rc {
 
 // small hack for windows. I don't feel I should use va_args and forward just
 // to have this one function properly cross-platform abstracted
-#if defined(_WIN32)
+#if defined(_WIN32) && !defined(__GNUC__)
 #define snprintf(...) sprintf_s(__VA_ARGS__)
 #endif
 

io_win32.c

@@ -25,7 +25,7 @@
 #include <stdio.h>
 #include <sys/stat.h>
 #include <sys/types.h>
-#include <Shlobj.h>
+#include <shlobj.h>
 
 FILE* ethash_fopen(char const* file_name, char const* mode)
 {