sqlite3: Assorted memory management fixes for strings and blobs.
sqlite3: Assorted memory management fixes for strings and blobs.

jessevdk/vala,spidermonkdust/vala,rvu95/vala,GNOME/vala,tjol/vala-tjol,spidermonkdust/vala,frida/vala,kamanashisroy/aroop,rvu95/vala,Distrotech/vala,frida/vala,severinh/vala,frida/vala,jessevdk/vala,kamanashisroy/aroop,flobrosch/vala-fixes,GNOME/vala,flobrosch/vala-fixes,Distrotech/vala,rvu95/vala,playya/vala,jessevdk/vala,GNOME/vala,frida/vala,frida/vala,severinh/vala,playya/vala,severinh/vala,Distrotech/vala,flobrosch/vala-fixes,spidermonkdust/vala,playya/vala,kamanashisroy/aroop,GNOME/vala,tjol/vala-tjol,tjol/vala-tjol,xdave/pvala