SPV, push_back() , push_front

test.c

#include "spv.h"

void main(){
    SPV test;
    SPVconstruct(3,&test);      //this shows  3 garbage values
    //SPVconstruct(0,&test);    //this works fine


    int i;
    for(i=0;i<3;i++){
        SPVpush_back(&test,999);
        //SPVpush_front(&test,999);
    }
    SPVprint(&test);        //prints some garbage values
}

Found problem and fixed, my compiler GCC zero initializes malloc by default, but your compiler MingW does not. Now I've updated it to manually zero initialize by default and added another Constructor without zero initialization.

Check it now and let me know.
Added zero initialization and a simple optimization in case compiler already did it.

Thanks a lot for finding this bug.

It is working fine
Zero padded