Fix invalid free

Author: weltling

sapi/cgi/cgi_main.c

@@ -582,12 +582,20 @@ static char *sapi_fcgi_getenv(char *name, size_t name_len)
 	fcgi_request *request = (fcgi_request*) SG(server_context);
 	char *ret = fcgi_getenv(request, name, (int)name_len);
 
+#ifndef PHP_WIN32
 	if (ret) return ret;
 	/*  if cgi, or fastcgi and not found in fcgi env
 		check the regular environment */
-#ifndef PHP_WIN32
 	return getenv(name);
 #else
+	if (ret) {
+		/* The functions outside here don't know, where does it come
+			from. They'll need to free the returned memory as it's
+			not necessary from the fcgi env. */
+		return strdup(ret);
+	}
+	/*  if cgi, or fastcgi and not found in fcgi env
+		check the regular environment */
 	return cgi_getenv_win32(name, name_len);
 #endif
 }