Fix the MSVC build.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@128441 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/MC/MCDisassembler/Disassembler.cpp b/lib/MC/MCDisassembler/Disassembler.cpp
index 4d65c22..4707198 100644
--- a/lib/MC/MCDisassembler/Disassembler.cpp
+++ b/lib/MC/MCDisassembler/Disassembler.cpp
@@ -160,7 +160,11 @@
 
   std::string p;
   p = OS.str();
+#ifdef LLVM_ON_WIN32
+  sprintf(OutString, "%s", p.c_str());
+#else
   snprintf(OutString, OutStringSize, "%s", p.c_str());
+#endif
   return Size;
 }