Lookup() constify call-site

plow/PlowCmd.c: Lookup() constify call-site
plot/plotVers.c: Lookup() constify call-site
plot/plotMain.c: Lookup() constify call-site
plot/plotCmd.c: Lookup() constify call-site
netmenu/NMnetlist.c: Lookup() constify call-site
netmenu/NMcmdLZ.c: Lookup() constify call-site
netmenu/NMcmdAK.c: Lookup() constify call-site
lef/lefTech.c: Lookup() constify call-site
lef/lefCmd.c: Lookup() constify call-site
irouter/irRoute.c: Lookup() constify call-site
irouter/irCommand.c: Lookup() constify call-site
router/rtrCmd.c: Lookup() constify call-site
resis/ResRex.c: Lookup() constify call-site
gcr/gcrShwFlgs.c: Lookup() constify call-site
windows/windCmdSZ.c: Lookup() constify call-site

plot/plotCmd.c

@@ -91,7 +91,7 @@ CmdPlot(w, cmd)
     TxCommand *cmd;
 {
     int option;
-    char **msg;
+    const char * const *msg;
     MagWindow *window;
     DBWclientRec *crec;
     TileTypeBitMask mask;
@@ -105,7 +105,7 @@ CmdPlot(w, cmd)
     extern void GrTCairoPlotSVG();
 #endif
 
-    static char *cmdPlotOption[] =
+    static const char * const cmdPlotOption[] =
     {
 	"postscript file [layers]    generate PostScript file for what's\n\
                                      underneath the box",

plot/plotMain.c

@@ -52,7 +52,7 @@ static char rcsid[] __attribute__ ((unused)) = "$Header: /usr/cvsroot/magic-8.0/
 /* remain in the following lists so that magic doesn't complain when	*/
 /* encountering these styles in the technology file.			*/
 
-static char *plotStyles[] =		/* Names of tech subsections. */
+static const char * const plotStyles[] =		/* Names of tech subsections. */
 {
     "postscript",
     "pnm",
@@ -64,7 +64,7 @@ static char *plotStyles[] =		/* Names of tech subsections. */
 };
 
 /* These names need to match the plot types enumerated in plotInt.h */
-static char *plotTypeNames[] =
+static const char * const plotTypeNames[] =
 {
     "versatec_color",
     "versatec_bw",
@@ -384,8 +384,8 @@ PlotSetParam(name, value)
     char *value;		/* New value for the parameter. */
 {
     int indx, i;
-    static char *tfNames[] = { "false", "true", 0 };
-    static char *paramNames[] =
+    static const char * const tfNames[] = { "false", "true", 0 };
+    static const char * const paramNames[] =
     {
 	"showcellnames",
 	"ps_cellidfont",

plot/plotVers.c

@@ -1074,7 +1074,7 @@ PlotVersatec(scx, layers, xMask, user_scale)
 					 */
     int user_scale;			/* Scalefactor of output */
 {
-    static char *yesNo[] = {"no", "yes", NULL};
+    static const char * const yesNo[] = {"no", "yes", NULL};
     int dotsAcross, dotsDown, swathsDown, scaleDown;
     int mag_width;			/* lambda */
     float width;			/* inches */