Fix a bug in Windows resource file detection.

The magic bytes should not include the trailing NUL byte.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@192769 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Support/Path.cpp b/lib/Support/Path.cpp
index 390614b..7fc9ab8 100644
--- a/lib/Support/Path.cpp
+++ b/lib/Support/Path.cpp
@@ -849,7 +849,7 @@
   switch ((unsigned char)Magic[0]) {
     case 0x00: {
       // Windows resource file
-      const char Expected[] = "\0\0\0\0\x20\0\0\0\xff";
+      const char Expected[] = { 0, 0, 0, 0, '\x20', 0, 0, 0, '\xff' };
       if (Magic.size() >= sizeof(Expected) &&
           memcmp(Magic.data(), Expected, sizeof(Expected)) == 0)
         return file_magic::windows_resource;