MultirotorMixer: allow for longer mixer geometry names (16 instead of 8)

src/lib/mixer/MultirotorMixer/MultirotorMixer.cpp

@@ -112,7 +112,7 @@ MultirotorMixer *
 MultirotorMixer::from_text(Mixer::ControlCallback control_cb, uintptr_t cb_handle, const char *buf, unsigned &buflen)
 {
 	MultirotorGeometry geometry = MultirotorGeometry::MAX_GEOMETRY;
-	char geomname[8];
+	char geomname[16];
 	int s[4];
 	int used;
 
@@ -121,7 +121,7 @@ MultirotorMixer::from_text(Mixer::ControlCallback control_cb, uintptr_t cb_handl
 		return nullptr;
 	}
 
-	if (sscanf(buf, "R: %7s %d %d %d %d%n", geomname, &s[0], &s[1], &s[2], &s[3], &used) != 5) {
+	if (sscanf(buf, "R: %15s %d %d %d %d%n", geomname, &s[0], &s[1], &s[2], &s[3], &used) != 5) {
 		debug("multirotor parse failed on '%s'", buf);
 		return nullptr;
 	}