maint: Use parentheses around condition for switch(),while(),if() statements. * libinterp/corefcn/dirfns.cc, libinterp/octave-value/ov-fcn-handle.cc, liboctave/array/Sparse.cc, scripts/image/rgb2ind.m, scripts/io/importdata.m, scripts/io/strread.m, scripts/optimization/fminbnd.m, scripts/optimization/sqp.m, scripts/plot/graphics_toolkit.m, scripts/plot/hdl2struct.m, scripts/plot/legend.m, scripts/plot/print.m, scripts/plot/printd.m, scripts/plot/private/__contour__.m, scripts/plot/private/__go_draw_axes__.m, scripts/plot/struct2hdl.m, scripts/polynomial/polyeig.m, scripts/sparse/bicg.m, scripts/specfun/ellipke.m, scripts/special-matrix/gallery.m, scripts/ui/errordlg.m, scripts/ui/helpdlg.m, scripts/ui/inputdlg.m, scripts/ui/listdlg.m, scripts/ui/questdlg.m, scripts/ui/warndlg.m: Use parentheses around condition for switch(),while(),if() statements.

--- a/libinterp/octave-value/ov-fcn-handle.cc	Tue Jul 09 12:22:33 2013 -0700
+++ b/libinterp/octave-value/ov-fcn-handle.cc	Tue Jul 09 14:04:05 2013 -0700
@@ -1329,14 +1329,14 @@
 
 /*
 %!function fcn_handle_save_recurse (n, mode, nm, f2, g2, hm2, hdld2, hbi2)
-%!  if n == 0
+%!  if (n == 0)
 %!    save (mode, nm, "f2", "g2", "hm2", "hdld2", "hbi2");
 %!  else
 %!    fcn_handle_save_recurse (n - 1, mode, nm, f2, g2, hm2, hdld2, hbi2);
 %!  endif
 %!endfunction
 %!function [f2, g2, hm2, hdld2, hbi2] = fcn_handle_load_recurse (n, nm)
-%!  if n == 0
+%!  if (n == 0)
 %!    load (nm)
 %!  else
 %!    [f2, g2, hm2, hdld2, hbi2] = fcn_handle_load_recurse (n - 1, nm);