Fix "map" processing in config files.

Trying to calculate the size of an extern array at runtime is fatal -- it's
also going to either evaluate to zero (if passed by pointer) or fail at
compilation, because sizeof is compile-time only.

Therefore, give the commands[] array a pre-calculated size -- which can
then be used properly when trying to set any "map" lines encountered in
Vimprobable's config file.

config.h

@@ -83,7 +83,7 @@ static Searchengine searchengines[] = {
 static Searchengine *defsearch = &searchengines[0];
 
 /* command mapping */
-Command commands[] = {
+Command commands[COMMANDSIZE] = {
     /* command,                                        	function,         argument */
     { "ba",                                            	navigate,         {NavigationBack} },
     { "back",                                          	navigate,         {NavigationBack} },

utilities.c

@@ -13,7 +13,7 @@
 #include "utilities.h"
 
 extern char commandhistory[COMMANDHISTSIZE][255];
-extern Command *commands;
+extern Command commands[COMMANDSIZE];
 extern int lastcommand, maxcommands, commandpointer;
 extern KeyList *keylistroot;
 extern Key keys[];

vimprobable.h

@@ -168,5 +168,8 @@ typedef struct {
 #define             HISTORY_STORAGE_FILENAME    "%s/.config/vimprobable/history", getenv("HOME")
 #define             CLOSED_URL_FILENAME         "%s/.config/vimprobable/closed", getenv("HOME")
 
+/* Command size */
+#define		    COMMANDSIZE			1024
+
 /* completion list size */
 #define             MAX_LIST_SIZE               40