gcc 4.3 build issues

Imprudence fails to build on a system with gcc 4.3. Most of the issues are to do with the compiler detecting the following as unsafe:

printf (someNonLiteralString);

The fix is to replace it with something along the lines of:

printf ("%s", someNonLiteralString);

Note that this doesn't affect this, as the compiler knows the string literal is safe:

printf ("A literal string");

The attached patch fixes the affected lines, and also fixes the "typedef struct Vertex" issue that is already fixed in the OpenAL branch. I've tested that it applies cleanly to a fresh download of the 1.0.0RC1 source.