gsdx-osd: Ensure we set proper data for osd options.

Should avoid any potential issues if ini values are wrong for osd.

plugins/GSdx/Renderers/Common/GSOsdManager.cpp

@@ -58,16 +58,16 @@ GSOsdManager::GSOsdManager() : m_atlas_h(0)
                              , m_onscreen_messages(0)
                              , m_texture_dirty(true)
 {
-	m_log_enabled = theApp.GetConfigB("osd_log_enabled");
-	m_log_timeout = std::max(2, std::min(theApp.GetConfigI("osd_log_timeout"), 10));
-	m_monitor_enabled = theApp.GetConfigB("osd_monitor_enabled");
-	m_opacity = std::max(0, std::min(theApp.GetConfigI("osd_color_opacity"), 100));
-	m_max_onscreen_messages = theApp.GetConfigI("osd_max_log_messages");
-	m_size = theApp.GetConfigI("osd_fontsize");
-
-	int r = theApp.GetConfigI("osd_color_r");
-	int g = theApp.GetConfigI("osd_color_g");
-	int b = theApp.GetConfigI("osd_color_b");
+	m_monitor_enabled       = theApp.GetConfigB("osd_monitor_enabled");
+	m_log_enabled           = theApp.GetConfigB("osd_log_enabled");
+	m_size                  = std::max(1, std::min(theApp.GetConfigI("osd_fontsize"), 100));
+	m_opacity               = std::max(0, std::min(theApp.GetConfigI("osd_color_opacity"), 100));
+	m_log_timeout           = std::max(2, std::min(theApp.GetConfigI("osd_log_timeout"), 10));
+	m_max_onscreen_messages = std::max(1, std::min(theApp.GetConfigI("osd_max_log_messages"), 20));
+
+	int r = std::max(0, std::min(theApp.GetConfigI("osd_color_r"), 255));
+	int g = std::max(0, std::min(theApp.GetConfigI("osd_color_g"), 255));
+	int b = std::max(0, std::min(theApp.GetConfigI("osd_color_b"), 255));
 
 	m_color = r | (g << 8) | (b << 16) | (255 << 24);