silence clang "dead assignment" warnings

gtk2_ardour/midi_tracer.cc

@@ -405,6 +405,8 @@ MidiTracer::tracer (Parser&, byte* msg, size_t len)
 	// If you want to append more to the line, uncomment this first
 	// bufsize -= s;
 
+	assert(s <= buffer_size); // clang dead-assignment
+
 	fifo.write (&buf, 1);
 
 	if (g_atomic_int_get (const_cast<gint*> (&_update_queued)) == 0) {

libs/evoral/src/libsmf/smf_decode.c

@@ -285,6 +285,7 @@ smf_event_decode_metadata(const smf_event_t *event)
 			goto error;
 	}
 
+	assert (off < BUFFER_SIZE);
 	return (buf);
 
 error:
@@ -342,6 +343,7 @@ smf_event_decode_system_realtime(const smf_event_t *event)
 			return (NULL);
 	}
 
+	assert (off < BUFFER_SIZE);
 	return (buf);
 }
 
@@ -373,6 +375,7 @@ smf_event_decode_sysex(const smf_event_t *event)
 	} else {
 		off += snprintf(buf + off, BUFFER_SIZE - off, "SysEx, manufacturer 0x%x", manufacturer);
 
+		assert (off < BUFFER_SIZE);
 		return (buf);
 	}
 
@@ -445,6 +448,7 @@ smf_event_decode_sysex(const smf_event_t *event)
 	else
 		off += snprintf(buf + off, BUFFER_SIZE - off, ", Unknown");
 
+	assert (off <= BUFFER_SIZE);
 	return (buf);
 }
 
@@ -487,6 +491,7 @@ smf_event_decode_system_common(const smf_event_t *event)
 			return (NULL);
 	}
 
+	assert (off < BUFFER_SIZE);
 	return (buf);
 }
 
@@ -583,6 +588,8 @@ smf_event_decode(const smf_event_t *event)
 			return (NULL);
 	}
 
+	assert(off <= BUFFER_SIZE);
+
 	return (buf);
 }
 
@@ -633,6 +640,7 @@ smf_decode(const smf_t *smf)
 	else
 		off += snprintf(buf + off, BUFFER_SIZE - off, "; division: %d FPS, %d resolution", smf->frames_per_second, smf->resolution);
 
+	assert (off < BUFFER_SIZE);
 	return (buf);
 }