Use of black magic to fix #3267 (genstar)

Hum...  with the previous commit, it seems to work, but I have no idea of what I am doing....
Note for GAMA 2.0: a refactoring of the Genstar could be a good idea.

espacedev.gaml.extensions.genstar/src/espacedev/gaml/extensions/genstar/generator/FileBasedGenerator.java

@@ -139,6 +139,7 @@ public void generate(IScope scope, List<Map<String, Object>> inits, Integer max,
 				.map(s -> GenStarGamaUtils.toSurveyWrapper(scope, s, gsAttributes))
 				.collect(Collectors.toList());
 
+
 		// Set Genstar random engine to be the one of Gama for seed purpose consistancy !
 		GenstarRandom.setInstance(scope.getRandom().getGenerator());
 

espacedev.gaml.extensions.genstar/src/espacedev/gaml/extensions/genstar/utils/GenStarGamaSurveyUtils.java

@@ -215,7 +215,7 @@ public Double getTotalData() {
 				}
 			}
 
-			System.out.println("Total value is " + total);
+			//System.out.println("Total value is " + total);
 
 		} catch (final IOException e) {}
 		reader.close();

espacedev.gaml.extensions.genstar/src/espacedev/gaml/extensions/genstar/utils/GenStarGamaUtils.java

@@ -122,6 +122,7 @@ public static GSSurveyWrapper toSurveyWrapper(IScope scope, GamaCSVFile survey,
 		GenStarGamaSurveyUtils gsg = null;
 		try {
 			gsg = new GenStarGamaSurveyUtils(scope,survey,atts);
+
 		} catch (FileNotFoundException e) {
 			GamaRuntimeException.create(e, scope);
 		}

espacedev.gaml.extensions.genstar/src/gospl/distribution/GosplInputDataManager.java

@@ -128,7 +128,7 @@ public void buildDataTables() throws IOException, InvalidSurveyFormatException,
 		GosplSurveyFactory sf = new GosplSurveyFactory();
 		this.inputData = new HashSet<>();
 		for (final GSSurveyWrapper wrapper : this.configuration.getSurveyWrappers())
-			if (!wrapper.getSurveyType().equals(GSSurveyType.Sample))
+			if (!wrapper.getSurveyType().equals(GSSurveyType.Sample)) {
 				this.inputData.addAll(
 						getDataTables(
 								sf.getSurvey(
@@ -137,6 +137,7 @@ public void buildDataTables() throws IOException, InvalidSurveyFormatException,
 										), 
 						this.configuration.getDictionary()
 						));
+			}
 	}
 
 	/**

espacedev.gaml.extensions.genstar/src/gospl/io/CsvInputHandler.java

@@ -156,6 +156,14 @@ protected CsvInputHandler(File file, boolean storeInMemory, String charset, char
 		}
 		reader.close();
 
+		if (dataTable != null) {
+			for (String[] str : dataTable) {
+				for (int i = 0; i < str.length; i++) {
+					if (str[i].isBlank())
+						str[i] = "";
+				}
+			}
+		}
 		this.firstRowDataIndex = firstRowDataIndex;
 		this.firstColumnDataIndex = firstColumnDataIndex;