Fixed building libssh with MSVC.

Thanks to Carlo Segato for the patch.

include/libssh/libssh.h

@@ -54,6 +54,7 @@
   typedef unsigned short uint16_t;
   typedef unsigned char uint8_t;
   typedef unsigned long long uint64_t;
+  typedef uint32_t mode_t;
 #else /* _MSC_VER */
   #include <unistd.h>
   #include <inttypes.h>

include/libssh/priv.h

@@ -34,6 +34,10 @@
 #define snprintf _snprintf
 /** Imitate define of inttypes.h */
 #define PRIdS "Id"
+#define strcasecmp _stricmp
+#define strncasecmp _strnicmp
+#define strtoull _strtoui64
+#define isblank(ch) ((ch) == ' ' || (ch) == '\t' || (ch) == '\n' || (ch) == '\r')
 #else
 #include <unistd.h>
 #define PRIdS "zd"

include/libssh/sftp.h

@@ -61,9 +61,6 @@ extern "C" {
   typedef uint32_t gid_t;
 #endif /* gid_t */
 #ifdef _MSC_VER
-#ifndef mode_t
-  typedef uint32_t mode_t;
-#endif /* mode_t */
 #ifndef ssize_t
   typedef _W64 signed int ssize_t;
 #endif /* ssize_t */