Derived class fixes to remove const qualifier.

Former-commit-id: cfafb22ae47303827138e13b44df18ed252f390f

include/interfaces/irdb/STARSSSAInstruction.h

@@ -28,7 +28,7 @@ class STARS_SSA_Instruction_t : public STARS_Instruction_t
 
 		// Get (accessor) methods
 		virtual inline uint16_t GetSize(void) const { assert(0); }
-		virtual inline uint16_t GetIDAOpcode(void) const { return STARS_NN_fnop; }
+		virtual inline uint16_t GetIDAOpcode(void) { return STARS_NN_fnop; }
 		virtual STARS_InstructionID_t GetNextInstructionID(void) const { assert(0); }
 		virtual STARS_InstructionID_t GetTargetInstructionID(void) const { assert(0); }
 		virtual inline uint32_t GetInstFeatures(void) const { assert(0); }