refactor(sema): move heuristic to not change ending depths

Author: JohelEGP

source/sema.h

@@ -1929,23 +1929,25 @@ class sema
 
     auto end(compound_statement_node const& n, int) -> void
     {
+        symbols.emplace_back(
+            scope_depth,
+            compound_sym{ false, &n, kind_of(n) }
+        );
+        --scope_depth;
+
         //  Pop an implicit 'else' branch.
         if (auto s = std::find_if(
                          symbols.rbegin(),
                          symbols.rend(),
                          [=](symbol s) {
-                             return s.depth == scope_depth - 1;
+                             return s.depth == scope_depth;
                          });
-            s == symbols.rend()
-            || std::get_if<symbol::selection>(&s->sym)
-            ) {
+            s != symbols.rend()
+            && std::get_if<symbol::selection>(&s->sym)
+            )
+        {
             --scope_depth;
         }
-        symbols.emplace_back(
-            scope_depth,
-            compound_sym{ false, &n, kind_of(n) }
-        );
-        --scope_depth;
     }
 
     auto start(assignment_expression_node const& n, int)