Fix incorrect use of reinterpret_cast

[safocl]

Using reinterpret_cast from string (array of chars) (?) to uint32, uint64, uint16 is undefined behavior (program attempts to access the stored value of an object through a glvalue through which it is not type-accessible).
https://eel.is/c++draft/basic.lval#11

11 An object of dynamic type Tobj is type-accessible through a glvalue of type Tref if Tref is similar ([conv.qual]) to:
(11.1) -- Tobj,
(11.2) -- a type that is the signed or unsigned type corresponding to Tobj, or
(11.3) -- a char, unsigned char, or std​::​byte type.

If a program attempts to access ([defns.access]) the stored value of an object through a glvalue through which it is not type-accessible, the behavior is undefined.38

fix for #30300

[CLAassistant]

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