cookie: remove redundant check

... as it was already checked previously within the function.

Reported-by: Dmitry-Me
Closes #695

lib/cookie.c

@@ -1277,6 +1277,7 @@ static int cookie_output(struct CookieInfo *c, const char *dumphere)
   struct Cookie *co;
   FILE *out;
   bool use_stdout=FALSE;
+  char *format_ptr;
 
   if((NULL == c) || (0 == c->numcookies))
     /* If there are no known cookies, we don't write or even create any
@@ -1297,9 +1298,6 @@ static int cookie_output(struct CookieInfo *c, const char *dumphere)
       return 1; /* failure */
   }
 
-  if(c) {
-    char *format_ptr;
-
   fputs("# Netscape HTTP Cookie File\n"
         "# https://curl.haxx.se/docs/http-cookies.html\n"
         "# This file was generated by libcurl! Edit at your own risk.\n\n",
@@ -1318,7 +1316,6 @@ static int cookie_output(struct CookieInfo *c, const char *dumphere)
     fprintf(out, "%s\n", format_ptr);
     free(format_ptr);
   }
-  }
 
   if(!use_stdout)
     fclose(out);