From c18eda3a1a7fe805a851cf6cd16a8411025e0d49 Mon Sep 17 00:00:00 2001
From: Camilla Berglund <elmindreda@elmindreda.org>
Date: Tue, 4 Oct 2011 01:06:43 +0200
Subject: [PATCH] Added error messages.

---
 src/fullscreen.c | 13 +++++++++++--
 1 file changed, 11 insertions(+), 2 deletions(-)

diff --git a/src/fullscreen.c b/src/fullscreen.c
index 7cc96bb7..631f6193 100644
--- a/src/fullscreen.c
+++ b/src/fullscreen.c
@@ -110,9 +110,18 @@ GLFWAPI int glfwGetVideoModes(GLFWvidmode* list, int maxcount)
         return 0;
     }
 
-    if (maxcount <= 0 || list == NULL)
+    if (maxcount <= 0)
     {
-        // TODO: Figure out if this is an error
+        _glfwSetError(GLFW_INVALID_VALUE,
+                      "glfwGetVideoModes: Parameter 'maxcount' must be "
+                      "greater than zero");
+        return 0;
+    }
+
+    if (list == NULL)
+    {
+        _glfwSetError(GLFW_INVALID_VALUE,
+                      "glfwGetVideoModes: Parameter 'list' cannot be NULL");
         return 0;
     }