EmuCodeBlock: Make farcode and nearcode protected

This is the only context they're used in.

Source/Core/Core/PowerPC/Jit64Common/EmuCodeBlock.h

@@ -22,9 +22,6 @@ class Mapping;
 class EmuCodeBlock : public Gen::X64CodeBlock
 {
 public:
-  FarCodeCache farcode;
-  u8* nearcode;  // Backed up when we switch to far code.
-
   void MemoryExceptionCheck();
 
   // Simple functions to switch between near and far code emitting
@@ -108,6 +105,9 @@ public:
   void Clear();
 
 protected:
+  FarCodeCache farcode;
+  u8* nearcode;  // Backed up when we switch to far code.
+
   std::unordered_map<u8*, TrampolineInfo> backPatchInfo;
   std::unordered_map<u8*, u8*> exceptionHandlerAtLoc;
 };