Remove some cython warnings

coro/_coro.pyx

@@ -70,8 +70,12 @@ cdef extern from "Python.h":
     ctypedef struct PyThreadState:
         PyFrameObject * frame
         int recursion_depth
-        void * curexc_type, * curexc_value, * curexc_traceback
-        void * exc_type, * exc_value, * exc_traceback
+        void * curexc_type
+        void * curexc_value
+        void * curexc_traceback
+        void * exc_type
+        void * exc_value
+        void * exc_traceback
     PyThreadState * _PyThreadState_Current
 
 # ================================================================================

coro/poller.pyx

@@ -482,7 +482,8 @@ cdef public class queue_poller [ object queue_poller_object, type queue_poller_t
     def poll (self, timeout=(30,0), int nevents=2000):
         cdef timespec ts
         cdef int r, i
-        cdef kevent * events, * k
+        cdef kevent * events
+        cdef kevent * k
         cdef coro co
         cdef kevent_target kt
         cdef kevent_key kk

coro/profile.pyx

@@ -715,7 +715,8 @@ cdef class _profiler:
 
     cdef int dispatch (self, _frame * frame, int what, void * arg) except -1:
         """The main profiler dispatch called by Python."""
-        cdef call_stack * top, * link
+        cdef call_stack * top
+        cdef call_stack * link
         # top may be NULL when a coro first starts.
         top = (<coro>the_scheduler._current).top
         if what == PyTrace_CALL:

coro/socket.pyx

@@ -494,7 +494,8 @@ cdef public class sock [ object sock_object, type sock_type ]:
         :raises EOFError: Not all data could be read.  The first argument
               includes any partial data read as a string.
         """
-        cdef char * p, * p0
+        cdef char * p
+        cdef char * p0
         cdef int r
         cdef bytes buffer