transceiver: uhd: increase log level on constructor errors

Exceptions on make are major no-start conditions. Make these
errors more apparent.

Signed-off-by: Thomas Tsou <ttsou@vt.edu>

git-svn-id: http://wush.net/svn/range/software/public/openbts/trunk@2688 19bc5d8c-e614-43d4-8b26-e1612bc8e597
diff --git a/Transceiver52M/UHDDevice.cpp b/Transceiver52M/UHDDevice.cpp
index 2dccb59..4eba136 100644
--- a/Transceiver52M/UHDDevice.cpp
+++ b/Transceiver52M/UHDDevice.cpp
@@ -419,7 +419,7 @@
 	try {
 		usrp_dev = uhd::usrp::single_usrp::make(dev_addr);
 	} catch(...) {
-		LOG(ERR) << "UHD make failed";
+		LOG(ALERT) << "UHD make failed";
 		return false;
 	}