Fix edge case in findDelimiter (#7911)

#changelog #addon #networking

Author: smeyfroi

addons/ofxNetwork/src/ofxTCPClient.cpp

@@ -283,6 +283,10 @@ static int findDelimiter(char * data, int size, string delimiter){
 			posInDelimiter++;
 			if(posInDelimiter==delimiter.size()) return i-delimiter.size()+1;
 		}else{
+			if(posInDelimiter>0){
+				// Stay at the same position to try matching again
+				i--;
+			}
 			posInDelimiter=0;
 		}
 	}