Font: minor tweak to struct alignment.

imgui.h

@@ -3457,10 +3457,10 @@ struct ImFont
     ImWchar                     FallbackChar;       // 2-4   // out // = FFFD/'?' // Character used if a glyph isn't found.
     float                       EllipsisWidth;      // 4     // out               // Width
     float                       EllipsisCharStep;   // 4     // out               // Step between characters when EllipsisCount > 0
-    bool                        DirtyLookupTables;  // 1     // out //
     float                       Scale;              // 4     // in  // = 1.f      // Base font scale, multiplied by the per-window font scale which you can adjust with SetWindowFontScale()
     float                       Ascent, Descent;    // 4+4   // out //            // Ascent: distance from top to bottom of e.g. 'A' [0..FontSize] (unscaled)
     int                         MetricsTotalSurface;// 4     // out //            // Total surface in pixels to get an idea of the font rasterization/texture cost (not exact, we approximate the cost of padding between glyphs)
+    bool                        DirtyLookupTables;  // 1     // out //
     ImU8                        Used8kPagesMap[(IM_UNICODE_CODEPOINT_MAX+1)/8192/8]; // 1 bytes if ImWchar=ImWchar16, 16 bytes if ImWchar==ImWchar32. Store 1-bit for each block of 4K codepoints that has one active glyph. This is mainly used to facilitate iterations across all used codepoints.
 
     // Methods