Attempt to workaround Visual C 9.0 for CPython 2.7 on windows missing...

Attempt to workaround Visual C 9.0 for CPython 2.7 on windows missing stdint.h. Also correct a compiler warning.

src/gevent/libev/libev.pxd

 # From cython/includes/libc/stdint.pxd
-# Longness only used for type promotion.
-# Actual compile time size used for conversions.
-
-# 7.18 Integer types <stdint.h>
-cdef extern from "<stdint.h>" nogil:
-
-    # 7.18.1.4 Integer types capable of holding object pointers
-    ctypedef ssize_t intptr_t
+#   Longness only used for type promotion.
+#   Actual compile time size used for conversions.
+# We don't have stdint.h on visual studio 9.0 (2008) on windows, sigh,
+# so go with Py_ssize_t
+# ssize_t -> intptr_t
 
 cdef extern from "libev_vfd.h":
 # cython doesn't process pre-processor directives, so they
 # don't matter in this file. It just takes the last definition it sees.
+    ctypedef Py_ssize_t intptr_t
     ctypedef intptr_t vfd_socket_t
 
-    long vfd_get(int)
+    vfd_socket_t vfd_get(int)
     int vfd_open(long) except -1
     void vfd_free(int)
 

src/gevent/libev/libev_vfd.h

@@ -68,7 +68,7 @@ static CRITICAL_SECTION* vfd_make_lock()
  */
 static vfd_socket_t vfd_get(int fd)
 {
-	int handle = -1;
+	vfd_socket_t handle = -1;
 	VFD_LOCK_ENTER;
 	if (vfd_entries != NULL && fd >= 0 && fd < vfd_num)
 		handle = vfd_entries[fd].handle;
@@ -220,6 +220,6 @@ done:
  */
 typedef int vfd_socket_t;
 #define vfd_get(fd) (fd)
-#define vfd_open(fd) ((int)(fd))
+#define vfd_open(fd) (fd)
 #define vfd_free(fd)
 #endif /* _WIN32 */