Merge pull request #49 from denik/7d7751ac5192c68d3501e48f663f2cae77a57990

Avoid dramatic changes in the resulting .c file when the input .pyx file changes only slightly.

diff --cc Cython/Compiler/Code.py
index 98ddad0,923a312..e58a3e8
--- 1/Cython/Compiler/Code.py
--- 2/Cython/Compiler/Code.py
+++ b/Cython/Compiler/Code.py
@@@ -898,14 -508,10 +898,14 @@@ class GlobalState(object)
          self.declared_cnames = {}
          self.in_utility_code_generation = False
          self.emit_linenums = emit_linenums
 +        self.common_utility_include_dir = common_utility_include_dir
          self.parts = {}
 +        self.module_node = module_node # because some utility code generation needs it
 +                                       # (generating backwards-compatible Get/ReleaseBuffer
  
-         self.const_cname_counter = 1
+         self.const_cname_counters = {}
          self.string_const_index = {}
 +        self.pyunicode_ptr_const_index = {}
          self.int_const_index = {}
          self.py_constants = []