Merge pull request #2 from mendsley/wall

updting bgfx to compile cleanly with -Wall and -Wextra

src/bgfx_p.h

@@ -2872,8 +2872,8 @@ namespace bgfx
 
 				case WM_KEYDOWN:
 				case WM_SYSKEYDOWN:
-					if (WM_KEYDOWN == _id && VK_F11 == _wparam
-					||  WM_SYSKEYDOWN == _id && VK_RETURN == _wparam)
+					if ((WM_KEYDOWN == _id && VK_F11 == _wparam)
+					||  (WM_SYSKEYDOWN == _id && VK_RETURN == _wparam))
 					{
 						toggleWindowFrame();
 					}

src/renderer_gl.cpp

@@ -966,6 +966,7 @@ namespace bgfx
 				, data
 				, offset
 				);
+			(void)offset;
 		}
 
 		m_constantBuffer->finish();
@@ -1685,6 +1686,7 @@ namespace bgfx
 			}
 
 			BX_TRACE("GL_EXTENSION%s: %s", supported ? " (supported)" : "", name);
+			(void)supported;
 
  			pos += len+1;
  		}