Suppress compiler warning.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@91959 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/utils/TableGen/X86DisassemblerTables.cpp b/utils/TableGen/X86DisassemblerTables.cpp
index 7aab9b2..be07031 100644
--- a/utils/TableGen/X86DisassemblerTables.cpp
+++ b/utils/TableGen/X86DisassemblerTables.cpp
@@ -105,6 +105,8 @@
   INSTRUCTION_CONTEXTS
 #undef ENUM_ENTRY
   }
+
+  return 0;
 }
 
 /// stringForOperandType - Like stringForContext, but for OperandTypes.