fix bug with invalid neighbor checking

.idea/artifacts/SMA_SEIR_jar.xml

output.csv

outputToGraph.py

src/main/java/sma/SMA.java

src/main/java/sma/agents/RandomWalkingAgent.java

src/main/java/sma/environment/SquaredChunksEnvironment.java

src/main/resources/META-INF/MANIFEST.MF

src/main/resources/parameters.yaml

target/classes/META-INF/MANIFEST.MF

target/classes/parameters.yaml