Mark call to lirc_client.lirc_nextcode(...) as nogil, otherwise calli…

…ng it would block all threads in our python program

lirc/lirc.pyx

@@ -222,7 +222,10 @@ def nextcode():
     _is_init_or_error()
 
     cdef char * code
-    if lirc_client.lirc_nextcode(&code) == -1:
+    cdef int return_value
+    with nogil:
+        return_value = lirc_client.lirc_nextcode(&code)
+    if return_value == -1:
         free(code)
         raise NextCodeError("There was an error reading the next code.")
     if code == NULL:

lirc/lirc_client.pxd

@@ -12,5 +12,5 @@ cdef extern from "lirc/lirc_client.h":
     int lirc_readconfig(char *file,  lirc_config **config, void * check_callback)
     void lirc_freeconfig(lirc_config *config)
 
-    int lirc_nextcode(char **code)
+    int lirc_nextcode(char **code) nogil
     int lirc_code2char(lirc_config *config, char *code, char **string)