Fixed mismatched parenthesis.

Cython/Utility/TypeConversion.c

@@ -30,7 +30,7 @@
     // Use MS-specific _abs64 instead.
     #define __Pyx_sst_abs(value) _abs64(value)
 #else
-    #define __Pyx_sst_abs(value) ((value<0) ? -value : value))
+    #define __Pyx_sst_abs(value) ((value<0) ? -value : value)
 #endif
 
 static CYTHON_INLINE char* __Pyx_PyObject_AsString(PyObject*);