Testcase for cdef assignments

tests/run/cdefassign.pyx

+
+__doc__ = """
+   >>> test(1, 2)
+   4 1 2 2 0
+"""
+
+def test(x, int y):
+    if True:
+        before = 0
+    cdef int a = 4, b = x, c = y, *p = &y
+    print a, b, c, p[0], before
+
+# Also test that pruning cdefs doesn't hurt 
+def empty():
+    cdef int i