Ticket #77 (defect)

Changing some parameters of an account like username, hostname, port number... (that actually means to set up a different account on top of an existing one causes) corrupt the summary file. For example in Modest we get SIGSEVs when trying to get some values from the new headers, like in this backtrace

Backtrace:
#0  0x400d8134 in strlen () from /lib/libc.so.6
#0  0x400d8134 in strlen () from /lib/libc.so.6
#1  0x40b53f00 in IA__g_strdup (str=0x442c5900 <Address 0x442c5900 out of
bounds>) at gstrfuncs.c:90
#2  0x41682e68 in tny_camel_header_dup_from (self=0x27c450) at
tny-camel-header.c:234
#3  0x416bf8ea in tny_header_dup_from (self=0x27c450) at tny-header.c:397
#4  0x4166eec2 in tny_gtk_header_list_model_get_value (self=0x442c5900,
iter=0x27c450, column=0, value=0xbecbf938) at tny-gtk-header-list-model.c:455
#5  0x40777168 in IA__gtk_tree_model_get_value (tree_model=0x207320,
iter=0xbecbf858, column=0, value=0xbecbf938) at gtktreemodel.c:1143
#6  0x4077fef0 in gtk_tree_model_sort_get_value (tree_model=0x6adf0,
iter=0x4077fef0, column=0, value=0xbecbf938) at gtktreemodelsort.c:1006
#7  0x40777168 in IA__gtk_tree_model_get_value (tree_model=0x6adf0,
iter=0xbecbf8a0, column=0, value=0xbecbf938) at gtktreemodel.c:1143
#8  0x4077a11c in gtk_tree_model_filter_get_value (model=0x194ed0,
iter=0xbecbfc38, column=0, value=0xbecbf938) at gtktreemodelfilter.c:2314
#9  0x40777168 in IA__gtk_tree_model_get_value (tree_model=0x194ed0,
iter=0xbecbfc38, column=0, value=0xbecbf938) at gtktreemodel.c:1143
#10 0x40777cdc in IA__gtk_tree_model_get_valist (tree_model=0x194ed0,
iter=0xbecbfc38, var_args=0xbecbf99c) at gtktreemodel.c:1440
#11 0x40777f88 in IA__gtk_tree_model_get (tree_model=0x194ed0, iter=0xbecbfc38)
at gtktreemodel.c:1404