Headless (and main): Improve crash reporting

ext/disarm.h

@@ -45,6 +45,7 @@ struct ArmLSInstructionInfo {
 	int Rm;
 
 	// TODO: more.
+	int OperandSizeInBytes() const { return 1 << size; }
 };
 
 bool ArmAnalyzeLoadStore(uint32_t addr, uint32_t op, ArmLSInstructionInfo *info);

ext/loongarch-disasm.h

@@ -2761,6 +2761,8 @@ struct LoongArch64LSInstructionInfo {
     bool isFPLoadStore;
     int size; // 0 = 8-bit, 1 = 16-bit, 2 = 32-bit, 3 = 64-bit
     bool isMemoryWrite;
+
+	int OperandSizeInBytes() const { return size; }
 };
 
 uint32_t la_assemble(Ins *ins);

ext/riscv-disas.h

@@ -601,6 +601,7 @@ struct RiscVLSInstructionInfo {
     bool isFPLoadStore;
     int size;  // Size of the access, in bytes (1, 2, 4, or 8).
     bool isMemoryWrite;
+	int OperandSizeInBytes() const { return size; }
 };
 
 bool RiscVAnalyzeLoadStore(uint64_t addr, uint32_t word, RiscVLSInstructionInfo *info);