Add noexcept to fix compiling of cythonext (#1065)

src/urh/dev/native/lib/airspy.pyx

@@ -17,7 +17,7 @@ ctypedef unsigned long long uint64_t
 cdef cairspy.airspy_device* _c_device
 cdef object f
 
-cdef int _c_callback_recv(cairspy.airspy_transfer*transfer) with gil:
+cdef int _c_callback_recv(cairspy.airspy_transfer*transfer) noexcept with gil:
     global f
     try:
         (<object> f)(<float [:2*transfer.sample_count]>transfer.samples)

src/urh/dev/native/lib/hackrf.pyx

@@ -10,7 +10,7 @@ TIMEOUT = 0.2
 cdef object f
 cdef int RUNNING = 0
 
-cdef int _c_callback_recv(chackrf.hackrf_transfer*transfer)  with gil:
+cdef int _c_callback_recv(chackrf.hackrf_transfer*transfer) noexcept with gil:
     global f, RUNNING
     try:
         (<object> f)(transfer.buffer[0:transfer.valid_length])
@@ -19,7 +19,7 @@ cdef int _c_callback_recv(chackrf.hackrf_transfer*transfer)  with gil:
         logger.error("Cython-HackRF:" + str(e))
         return -1
 
-cdef int _c_callback_send(chackrf.hackrf_transfer*transfer)  with gil:
+cdef int _c_callback_send(chackrf.hackrf_transfer*transfer) noexcept with gil:
     global f, RUNNING
     # tostring() is a compatibility (numpy<1.9) alias for tobytes(). Despite its name it returns bytes not strings.
     cdef unsigned int i

src/urh/dev/native/lib/rtlsdr.pyx

@@ -8,7 +8,7 @@ ctypedef unsigned long long uint64_t
 
 cdef crtlsdr.rtlsdr_dev_t*_c_device
 
-cdef void _c_callback_recv(unsigned char *buffer, uint32_t length, void *ctx):
+cdef void _c_callback_recv(unsigned char *buffer, uint32_t length, void *ctx) noexcept:
     global f
     conn = <object> ctx
     (<object>f)(buffer[0:length])
@@ -339,4 +339,4 @@ cpdef int set_bias_tee(int on):
  
     return -1 if device is not initialized. 0 otherwise.
     """
-    return crtlsdr.rtlsdr_set_bias_tee (_c_device, on)
+    return crtlsdr.rtlsdr_set_bias_tee (_c_device, on)