fixed template to work with previous code generator

gen_input/templates/interp/CORENAME.cpp.gtl

@@ -314,8 +314,11 @@ typename vm_base<ARCH>::virt_addr_t vm_impl<ARCH>::execute_inst(finish_cond_e co
 		        <%}}%>// calculate next pc value
 		        *NEXT_PC = *PC + ${instr.length/8};
 		        // execute instruction
-		        <%instr.behavior.eachLine{%>${it}
+                try {
-		        <%}%>TRAP_${instr.name}:break;
+                <%instr.behavior.eachLine{%>${it}
+		        <%}%>
+		        } catch(...){}
+		        TRAP_${instr.name}:break;
 	    	}// @suppress("No break at end of case")<%}%>
             default: {
                 *NEXT_PC = *PC + ((instr & 3) == 3 ? 4 : 2);