fixed typo

source_modules/bladerf_source/src/main.cpp

@@ -306,7 +306,7 @@ public:
                 biasT = config.conf["devices"][selectedSerial]["biasT"];
             }
             else {
-                overallGain = false;
+                biasT = false;
             }
         }
 
@@ -616,4 +616,4 @@ MOD_EXPORT void _DELETE_INSTANCE_(ModuleManager::Instance* instance) {
 MOD_EXPORT void _END_() {
     config.disableAutoSave();
     config.save();
-}
+}