Use a better way to insert NOP breakpoint

previously statements serving as NOP breakpoint triggers compiler warnings. Now change it to a more informative macro that doesn't triggers warnings according to John's suggestion.

src/Common.h

@@ -56,6 +56,8 @@ using namespace std ;
 #define INT64 long long
 #endif
 
+#define BREAK_NOP {int i=0; i++;}
+
 // ----------------------------------------------------------------
 // Forward class declarations
 class Block;

src/StatementAssign.cpp

@@ -30,7 +30,7 @@
 #include "StatementAssign.h"
 #include <cassert>
 #include <iostream>
-
+#include "Common.h"
 #include "CGContext.h"
 #include "CGOptions.h"
 #include "Expression.h"
@@ -303,7 +303,7 @@ StatementAssign::visit_facts(vector<const Fact*>& inputs, CGContext& cg_context)
 	static int g = 0;
 	int h = g++;
 	if (h==57)
-		h = 57;
+		BREAK_NOP;
 	vector<const Fact*> inputs_copy = inputs;
 	// LHS and RHS can be evaludated in arbitrary order, try RHS first
 	Effect running_eff_context(cg_context.get_effect_context());

src/StatementGoto.cpp

@@ -219,8 +219,6 @@ StatementGoto::StatementGoto(Block* blk, const Expression &test, const Statement
 	}
 	else {
 		label = gensym("lbl_");
-		//if (label == "lbl_8")
-			//int g = 0;
 		stm_labels[dest] = label;
 	}
 }
@@ -235,8 +233,6 @@ StatementGoto::StatementGoto(const StatementGoto &sg)
 	  label(sg.label),
 	  init_skipped_vars(sg.init_skipped_vars)
 {
-	//if (label == "lbl_8")
-		//int g = 0;
 	// Nothing else to do.
 }