Started using game-specific flags and removed/replaced some SCI version checks with flags.

- The SCI0 new script header and the angles check have been replaced by the GF_SCI0_OLD flag
- The SCI0 new drawpic parameter and the new priority check have been replaced by the GF_SCI0_OLDGFXFUNCS flag
- Removed the code which retries to use the newer script header in SCI0 games if the detected one is wrong, as that case should be covered by the GF_SCI0_OLD flag
- Removed the leftover min_version and max_version variables from gamestate
- Cleaned up kGetTime() a bit

svn-id: r40552

engines/sci/engine/scriptdebug.cpp

@@ -1379,7 +1379,7 @@ reg_t disassemble(EngineState *s, reg_t pos, int print_bw_tag, int print_bytecod
 			int stackframe = (scr[pos.offset + 2] >> 1) + (*p_restadjust);
 			int argc = ((*p_sp)[- stackframe - 1]).offset;
 
-			if (s->version >= SCI_VERSION_FTU_NEW_SCRIPT_HEADER)
+			if (!(s->flags & GF_SCI0_OLD))
 				argc += (*p_restadjust);
 
 			sciprintf(" Kernel params: (");