Fix PdaDmaBuffer locking (was destroyed immediately after creation)

Author: PascalBoeschoten

src/Pda/PdaDmaBuffer.cxx

@@ -23,7 +23,7 @@ PdaDmaBuffer::PdaDmaBuffer(PdaDevice::PdaPciDevice pciDevice, void* userBufferAd
     int dmaBufferId, bool requireHugepage) : mPciDevice(pciDevice)
 {
   // Safeguard against PDA kernel module deadlocks, since it does not like parallel buffer registration
-  Interprocess::Lock {LOCK_FILE_PATH, MUTEX_NAME, true};
+  Interprocess::Lock lock {LOCK_FILE_PATH, MUTEX_NAME, true};
 
   try {
     // Tell PDA we're using our already allocated userspace buffer.
@@ -105,7 +105,7 @@ PdaDmaBuffer::~PdaDmaBuffer()
   // Safeguard against PDA kernel module deadlocks, since it does not like parallel buffer registration
   // NOTE: not sure if necessary for deregistration as well
   try {
-    Interprocess::Lock {LOCK_FILE_PATH, MUTEX_NAME, true};
+    Interprocess::Lock lock {LOCK_FILE_PATH, MUTEX_NAME, true};
     PciDevice_deleteDMABuffer(mPciDevice.get(), mDmaBuffer);
   } catch (std::exception& e) {
     // Nothing to be done?