fix: promote unsigned integers to double to prevent overflow #413
      
        
          +12
        
        
          −4
        
        
          
        
      
    
  
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Attempt to fix #412 , #171 , #132
Adds
is_unsignedparameter tovariable_type_from_field_type, and for unsigned ints (MYSQL_TYPE_LONG), will promote toMY_DBLinstead ofMY_INT32