- Fix a lot of warnings generated by -Wshorten-64-to-32

runtime/vm/disassembler_ia32.cc

Index: runtime/vm/disassembler_ia32.cc
===================================================================
--- runtime/vm/disassembler_ia32.cc	(revision 38492)
+++ runtime/vm/disassembler_ia32.cc	(working copy)
@@ -786,7 +786,7 @@
 int X86Decoder::JumpConditionalShort(uint8_t* data, const char* comment) {
   uint8_t cond = *data & 0x0F;
   uint8_t b = *(data+1);
-  word dest = reinterpret_cast<uword>(data) + static_cast<int8_t>(b) + 2;
+  uword dest = reinterpret_cast<uword>(data) + static_cast<int8_t>(b) + 2;
   const char* mnem = jump_conditional_mnem[cond];
   Print(mnem);
   Print(" ");