Port sc5 to C++.

sourcepawn/compiler/sc5-in.scp

@@ -42,7 +42,7 @@ unsigned char errstr_table
[][2] = {
 };
 /*-*SCPACK end of pair table, do not change or remove this line */
 
-static char *errmsg[] = {
+static const char *errmsg[] = {
 #ifdef SCPACK
 /*001*/  "expected token: \"%s\", but found \"%s\"\n",
 /*002*/  "only a single statement (or expression) can follow each \"case\"\n",
@@ -362,7 +362,7 @@ static char *errmsg[] = {
 #endif
        };
 
-static char *fatalmsg[] = {
+static const char *fatalmsg[] = {
 #ifdef SCPACK
 /*160*/  "cannot read from file: \"%s\"\n",
 /*161*/  "cannot write to file: \"%s\"\n",
@@ -398,7 +398,7 @@ static char *fatalmsg[] = {
 #endif
        };
 
-static char *warnmsg[] = {
+static const char *warnmsg[] = {
 #ifdef SCPACK
 /*200*/  "symbol \"%s\" is truncated to %d characters\n",
 /*201*/  "redefinition of constant/macro (symbol \"%s\")\n",