[Symbolize] Fix overflow warning on 32-bit hosts.

[mysterymath]

Summary

The inserted cast is a no-op.

[mysterymath]

Update tag.

[MaskRay]

LGTM.

llvm/include/llvm/DebugInfo/Symbolize/Symbolize.h

struct Options {
     bool RelativeAddresses = false;
     bool UntagAddresses = false;
     bool UseDIA = false;
     std::string DefaultArch;
     std::vector<std::string> DsymHints;
     std::string FallbackDebugPath;
     std::string DWPName;
     std::vector<std::string> DebugFileDirectory;
-    size_t MaxCacheSize = sizeof(size_t) == 4
-                              ? 512 * 1024 * 1024 /* 512 MiB */
-                              : 4ULL * 1024 * 1024 * 1024 /* 4 GiB */;
+    size_t MaxCacheSize =
+        sizeof(size_t) == 4
+            : static_cast<size_t>(4ULL * 1024 * 1024 * 1024) /* 4 GiB */;
   };
 
   LLVMSymbolizer();
   LLVMSymbolizer(const Options &Opts);
 
   ~LLVMSymbolizer();
 
   // Overloads accepting ObjectFile does not support COFF currently