Don't reload inline module if it's already loaded.

Cython/Build/Inline.py

@@ -147,6 +147,10 @@ def cython_inline(code,
     key = orig_code, arg_sigs, sys.version_info, sys.executable, Cython.__version__
     module_name = "_cython_inline_" + hashlib.md5(str(key).encode('utf-8')).hexdigest()
     
+    if module_name in sys.modules:
+        module = sys.modules[module_name]
+    
+    else:
         build_extension = None
         if cython_inline.so_ext is None:
             # Figure out and cache current extension suffix
@@ -199,6 +203,7 @@ def __invoke(%(params)s):
             build_extension.run()
 
         module = imp.load_dynamic(module_name, module_path)
+
     arg_list = [kwds[arg] for arg in arg_names]
     return module.__invoke(*arg_list)