prevent compiler warnings

lib/url.c

@@ -1691,13 +1691,13 @@ static CURLcode CreateConnection(struct SessionHandle *data,
   int urllen;
   Curl_addrinfo *hostaddr;
 #ifdef HAVE_ALARM
-  unsigned int prev_alarm;
+  unsigned int prev_alarm=0;
 #endif
   char endbracket;
 
 #ifdef HAVE_SIGACTION
   struct sigaction keep_sigact;   /* store the old struct here */
-  bool keep_copysig;              /* did copy it? */
+  bool keep_copysig=FALSE;        /* did copy it? */
 #else
 #ifdef HAVE_SIGNAL
   void *keep_sigact;              /* store the old handler here */