fix #13854: memleak might show misleading location

[ludviggunne]

This sets the column of added braces to the column of the token before it, so we can point to the last token of the scope.

Checking tickets/13854.c ...
tickets/13854.c:3:30: error: Memory leak: p1 [memleak]
        void * p1 = malloc(5);
                             ^

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

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