corrected bugs when generating code for the double DMA transfer

src/tmltranslator/ctranslator/CpuMemoryCopyMEC.java

src/tmltranslator/ctranslator/DoubleDmaMEC.java

src/tmltranslator/ctranslator/SingleDmaMEC.java

src/tmltranslator/ctranslator/TMLCCodeGeneration.java

src/ui/window/JDialogReferenceCP.java