Fix various GCC warnings

- fix overload hiding
- handle missing enumeration values in switch
- remove extraenous semicolons
- always have defaults in color converter switch
- fix root cause of stringop warning

source/Irrlicht/CColorConverter.cpp

@@ -760,10 +760,9 @@ void CColorConverter::convert_viaFormat(const void* sP, ECOLOR_FORMAT sF, s32 sN
 				IRR_CASE_IIMAGE_COMPRESSED_FORMAT
 					os::Printer::log("CColorConverter::convert_viaFormat method doesn't support compressed images.", ELL_WARNING);
 				break;
-#ifndef _DEBUG
+
 				default:
 					break;
-#endif
 			}
 		break;
 		case ECF_R5G6B5:
@@ -784,10 +783,9 @@ void CColorConverter::convert_viaFormat(const void* sP, ECOLOR_FORMAT sF, s32 sN
 				IRR_CASE_IIMAGE_COMPRESSED_FORMAT
 					os::Printer::log("CColorConverter::convert_viaFormat method doesn't support compressed images.", ELL_WARNING);
 				break;
-#ifndef _DEBUG
+
 				default:
 					break;
-#endif
 			}
 		break;
 		case ECF_A8R8G8B8:
@@ -808,10 +806,9 @@ void CColorConverter::convert_viaFormat(const void* sP, ECOLOR_FORMAT sF, s32 sN
 				IRR_CASE_IIMAGE_COMPRESSED_FORMAT
 					os::Printer::log("CColorConverter::convert_viaFormat method doesn't support compressed images.", ELL_WARNING);
 				break;
-#ifndef _DEBUG
+
 				default:
 					break;
-#endif
 			}
 		break;
 		case ECF_R8G8B8:
@@ -832,19 +829,17 @@ void CColorConverter::convert_viaFormat(const void* sP, ECOLOR_FORMAT sF, s32 sN
 				IRR_CASE_IIMAGE_COMPRESSED_FORMAT
 					os::Printer::log("CColorConverter::convert_viaFormat method doesn't support compressed images.", ELL_WARNING);
 				break;
-#ifndef _DEBUG
+
 				default:
 					break;
-#endif
 			}
 		break;
 		IRR_CASE_IIMAGE_COMPRESSED_FORMAT
 			os::Printer::log("CColorConverter::convert_viaFormat method doesn't support compressed images.", ELL_WARNING);
 			break;
-#ifndef _DEBUG
+
 		default:
-		break;
-#endif
+			break;
 	}
 }
 

source/Irrlicht/CIrrDeviceLinux.cpp

@@ -102,7 +102,7 @@ namespace
 #if defined(_IRR_LINUX_X11_XINPUT2_)
 	int XI_EXTENSIONS_OPCODE;
 #endif
-};
+}
 
 namespace irr
 {

source/Irrlicht/COpenGLDriver.h

@@ -148,6 +148,9 @@ namespace video
 			const core::rect<s32>& sourceRect, const core::rect<s32>* clipRect = 0,
 			const video::SColor* const colors = 0, bool useAlphaChannelOfTexture = false) _IRR_OVERRIDE_;
 
+		// Explicitly bring in base class methods, otherwise
+		// this overload would hide them.
+		using CNullDriver::draw2DImage;
 		virtual void draw2DImage(const video::ITexture* texture, u32 layer, bool flip);
 
 		//! draws a set of 2d images, using a color and the alpha channel of the

source/Irrlicht/CSceneManager.cpp

@@ -607,6 +607,9 @@ u32 CSceneManager::registerNodeForRendering(ISceneNode* node, E_SCENE_NODE_RENDE
 			taken = 1;
 		}
 
+	// as of yet unused
+	case ESNRP_LIGHT:
+	case ESNRP_SHADOW:
 	case ESNRP_NONE: // ignore this one
 		break;
 	}

source/Irrlicht/CSkinnedMesh.cpp

@@ -82,7 +82,7 @@ namespace
 	{
 		return a.rotation == b.rotation;
 	}
-};
+}
 
 namespace irr
 {