Fix warning on ARM processors.

Thanks to Kelly Anderson.

String.c

@@ -118,7 +118,7 @@ char* String_getToken(const char* line, const unsigned short int numMatch) {
          count++;
     
       if(inWord == 1){
-         if (count == numMatch && line[i] != ' ' && line[i] != '\0' && line[i] != '\n' && line[i] != EOF) {
+         if (count == numMatch && line[i] != ' ' && line[i] != '\0' && line[i] != '\n' && line[i] != (char)EOF) {
             match[foundCount] = line[i];
             foundCount++;
          }