private void setTrigramFileName(String name) {
		trigramFile = (name.endsWith(".sng")) ? name : (name + ".sng");
	}
Verify that adding padding bytes won't violate boundaries or allow defined data
or instructions to be overwritten.

@param program		current program
@param stringEndAddress	strings' end address
@param padLength		number of pad bytes
@return	actual number of pad bytes to add to the string
Ghidra/Features/Base/src/main/java/ghidra/app/plugin/core/string/StringsAnalyzer.java