Fix -Wreturn-type falling off the end of a function in new DIA code

llvm-svn: 318444
diff --git a/llvm/lib/DebugInfo/PDB/DIA/DIATable.cpp b/llvm/lib/DebugInfo/PDB/DIA/DIATable.cpp
index 7f4d06c..24454df 100644
--- a/llvm/lib/DebugInfo/PDB/DIA/DIATable.cpp
+++ b/llvm/lib/DebugInfo/PDB/DIA/DIATable.cpp
@@ -58,4 +58,5 @@
     return PDB_TableType::InputAssemblyFiles;
   if (Name16 == DiaTable_Dbg)
     return PDB_TableType::Dbg;
+  return PDBTableType::TableInvalid;
 }