Made some changes, move free to end of test

FuzzTarget.c

@@ -5,7 +5,7 @@
 //Test push for CI
 
 int LLVMFuzzerTestOneInput(const uint8_t * data, size_t size){
-    printf("%zu\n", size);
-    replace_chars((char*)data, size);
+    char* ret = replace_chars((char*)data, size);
+    free(ret);
     return 0;
 }

main.h

@@ -49,6 +49,6 @@ char* replace_chars(const char* string, size_t len){
         }
         charfarter++;
     }
-    free(new_string); //Only to appease ASAN, obviously the caller should free the resource
+    //free(new_string); //Only to appease ASAN, obviously the caller should free the resource
     return new_string;
 }
\ No newline at end of file