TCF Agent: DWARF 5: fixed location list base address

From DWARF 5 standard, section 2.6.2, if there is no preceding base
address entry, then the applicable base address defaults to the base address
of the compilation unit.

agent/tcf/services/dwarfexpr.c

diff --git a/agent/tcf/services/dwarfexpr.c b/agent/tcf/services/dwarfexpr.c
index 79c4fe7..a716c5a 100644
--- a/agent/tcf/services/dwarfexpr.c
+++ b/agent/tcf/services/dwarfexpr.c
@@ -65,8 +65,8 @@
         dio_EnterSection(&Unit->mDesc, Unit->mDesc.mSection, Value->mAddr - (U1_T *)Unit->mDesc.mSection->data);
         Offset = dio_ReadAddressX(NULL, Value->mSize);
         dio_ExitSection();
+        Base = Unit->mObject->u.mCode.mLowPC;
         if (Unit->mDesc.mVersion <= 4) {
-            Base = Unit->mObject->u.mCode.mLowPC;
             if (Unit->mDesc.mAddressSize < 8) AddrMax = ((U8_T)1 << Unit->mDesc.mAddressSize * 8) - 1;
             if (Cache->mDebugLoc == NULL) str_exception(ERR_INV_DWARF, "Missing .debug_loc section");
             dio_EnterSection(&Unit->mDesc, Cache->mDebugLoc, Offset);