File dont-corrupt-memory.patch of Package python-cffi.9418

# HG changeset patch
# User Armin Rigo <arigo@tunes.org>
# Date 1536088314 -7200
# Node ID 7a76a381534012af4790e815140d1538510b7d93
# Parent  ef09637b23147f63a7d3fda628fa1704c97f1c72
Issue #382

Second fix attempt, thanks Adam

--- a/testing/cffi0/test_function.py
+++ b/testing/cffi0/test_function.py
@@ -45,14 +45,14 @@ class TestFunction(object):
         assert x != math.sin(1.23)    # rounding effects
         assert abs(x - math.sin(1.23)) < 1E-6
 
-    def test_sin_no_return_value(self):
+    def test_lround_no_return_value(self):
         # check that 'void'-returning functions work too
         ffi = FFI(backend=self.Backend())
         ffi.cdef("""
-            void sin(double x);
+            void lround(double x);
         """)
         m = ffi.dlopen(lib_m)
-        x = m.sin(1.23)
+        x = m.lround(1.23)
         assert x is None
 
     def test_dlopen_filename(self):