Initialize newResponse because PAYLOAD_LEN is not a compile time constant

Author: SemvdH

src/ELMduino.cpp

@@ -2610,7 +2610,9 @@ void ELM327::parseMultiLineResponse() {
     uint8_t totalBytes = 0;
     uint8_t bytesReceived = 0;
     bool headerFound = false;
-    char newResponse[PAYLOAD_LEN] = {0};
+    char newResponse[PAYLOAD_LEN];
+    memset(newResponse, 0, PAYLOAD_LEN * sizeof(char)); // Initialize newResponse to empty string
+    
     char line[256] = "";
     char* start = payload;
     char* end = strchr(start, '\r');