Fix some compiler warnings

* -Wno-inline in autoconf builds (was already in meson builds)
* Use non-deprecated name for g_spawn_check_wait_status
* Update libgwater

configure.ac

@@ -74,7 +74,7 @@ AM_PROG_AR
 dnl ---------------------------------------------------------------------
 dnl Base CFLAGS
 dnl ---------------------------------------------------------------------
-AM_CFLAGS="-Wall -Wextra -Wparentheses -Winline -pedantic -Wno-overlength-strings -Wunreachable-code"
+AM_CFLAGS="-Wall -Wextra -Wparentheses -Wno-inline -pedantic -Wno-overlength-strings -Wunreachable-code"
 
 dnl ---------------------------------------------------------------------
 dnl Enable source code coverage reporting for GCC

source/rofi-icon-fetcher.c

@@ -210,11 +210,11 @@ static gboolean exec_thumbnailer_command(gchar **command_args) {
     NULL, G_SPAWN_DEFAULT | G_SPAWN_SEARCH_PATH, NULL, NULL, NULL, NULL, &wait_status, &error);
 
   if (spawned) {
-    return g_spawn_check_exit_status(wait_status, NULL);
+    return g_spawn_check_wait_status(wait_status, NULL);
   } else {
     g_warning("Error calling thumbnailer: %s", error->message);
     g_error_free(error);
-    
+
     return FALSE;
   }
 }