Accessing unallocated buffer in paramcard_set

[tueda]

program demo_set
    use paramcard
    implicit none
    call paramcard_set('a', 1)
end program demo_set

gives

At line 1195 of file ./src/paramcard.f90
Fortran runtime error: Index '1' of dimension 1 of array 'tmp_params' outside of expected range (1:0)

Error termination. Backtrace:
#0  0x7feff0c07692 in ???
#1  0x7feff0c08159 in ???
#2  0x7feff0c0876a in ???
#3  0x4065d3 in add_param
        at ./src/paramcard.f90:1195
#4  0x40ced5 in __paramcard_MOD_paramcard_set_str
        at ./src/paramcard.f90:828
#5  0x40c8fa in __paramcard_MOD_paramcard_set_int32
        at ./src/paramcard.f90:872
#6  0x40133c in demo_set
        at example/demo-set.f90:4
#7  0x401378 in main
        at example/demo-set.f90:2
<ERROR> Execution failed for object " demo-set "
<ERROR>*cmd_run*:stopping due to failed executions
STOP 1