Fix const char vs char warning

src/civetweb.c

@@ -351,7 +351,8 @@ static int pthread_mutex_lock(pthread_mutex_t *);
 static int pthread_mutex_unlock(pthread_mutex_t *);
 static void to_unicode(const char *path, wchar_t *wbuf, size_t wbuf_len);
 struct file;
-static char *mg_fgets(char *buf, size_t size, struct file *filep, char **p);
+static const char *
+mg_fgets(char *buf, size_t size, struct file *filep, char **p);
 
 #if defined(HAVE_STDINT)
 #include <stdint.h>
@@ -7516,7 +7517,8 @@ handle_cgi_request(struct mg_connection *conn, const char *prog)
 	if ((status = get_header(&ri, "Status")) != NULL) {
 		conn->status_code = atoi(status);
 		status_text = status;
-		while (isdigit(*(const unsigned char *)status_text) || *status_text == ' ') {
+		while (isdigit(*(const unsigned char *)status_text)
+		       || *status_text == ' ') {
 			status_text++;
 		}
 	} else if (get_header(&ri, "Location") != NULL) {