Cause the command-line shell to return non-zero if the final SQL statement

is incomplete.

FossilOrigin-Name: 177fff3b98b101b98f1e7d334b6a80530b645565

src/shell.c

@@ -3725,6 +3725,7 @@ static int process_input(ShellState *p, FILE *in){
   if( nSql ){
     if( !_all_whitespace(zSql) ){
       fprintf(stderr, "Error: incomplete SQL: %s\n", zSql);
+      errCnt++;
     }
     free(zSql);
   }