Fixed issues cropping up from building -O3

gui/build.sh

@@ -1 +1 @@
-gcc -g -Wall -Wextra $1 -fsanitize=address,undefined gui.c stb_truetype.o  -lX11 -lm
+gcc -g -Wall -Wextra -Wno-stringop-overflow $1 -fsanitize=address,undefined gui.c stb_truetype.o  -lX11 -lm

gui/gui.c

@@ -610,7 +610,13 @@ GUI_Subtree_Reference gui_get_subtree(
 			i = i->sibling)
 		{
 			GUI_Subtree *subtree = (GUI_Subtree*)i;
+			// NOTE(Zelaven): This line falsely triggers -Wstringop-overflow and the
+			//  copy into a temporary variable seemingly fixes it.
+			// For this reason I simply opted to use -Wno-stringop-overflow, as I
+			//  don't want to have a broken flag enabled.
 			rdic_cull_subtrees(&subtree->rdic, subtree->rdic.root);
+			//RDIC_Context *rdic_context = &subtree->rdic;
+			//rdic_cull_subtrees(rdic_context, subtree->rdic.root);
 		}
 	}