Fix double declaration for len

Author: paul-ion

codereview101/snipMemory5.cpp

@@ -2,7 +2,7 @@
 int len = 0, total = 0;
 while(1){
     fgets(buff1, MAX_SIZE, stdin);
-    int len =  strnlen(buff1, MAX_SIZE);
+    len =  strnlen(buff1, MAX_SIZE);
     total += len;
     if(total <= MAX_SIZE) strncat(buff2, buff1, len);
     else break;