FEXCore: Avoid potential OOB reads, and flag clobbers in ValidateCode

An instruction could be on the edge of a page and less than 16 bytes
long.

FEXCore/Source/Interface/IR/IRDumper.cpp

@@ -274,6 +274,10 @@ static void PrintArg(fextl::stringstream* out, const IRListView*, FEXCore::IR::B
   }
 }
 
+static void PrintArg(fextl::stringstream* out, const IRListView*, const std::array<uint8_t, 0x10>& Arg) {
+  *out << fextl::fmt::format("{:02x}", fmt::join(Arg, ""));
+}
+
 void Dump(fextl::stringstream* out, const IRListView* IR) {
   auto HeaderOp = IR->GetHeader();