Remove some cppcheck warnings about variable scope.

There were a couple variable that could have reduced scope.

tgt-vlog95/expr.c

@@ -247,9 +247,10 @@ static void emit_expr_select(ivl_scope_t scope, ivl_expr_t expr, unsigned wid)
  */
 static void emit_expr_func(ivl_scope_t scope, ivl_expr_t expr, const char* name)
 {
-      unsigned idx, count = ivl_expr_parms(expr);
+      unsigned count = ivl_expr_parms(expr);
       fprintf(vlog_out, "%s", name);
       if (count != 0) {
+	    unsigned idx;
 	    fprintf(vlog_out, "(");
 	    count -= 1;
 	    for (idx = 0; idx < count; idx += 1) {

tgt-vlog95/misc.c

@@ -89,11 +89,10 @@ void emit_scaled_delayx(ivl_scope_t scope, ivl_expr_t expr)
 	    emit_scaled_delay(scope, value);
       } else {
 	    int exp = ivl_scope_time_units(scope) - sim_precision;
-	    uint64_t scale = 1;
 	    assert(exp >= 0);
 	    if (exp == 0) emit_expr(scope, expr, 0);
 	    else {
-		  uint64_t scale_val;
+		  uint64_t scale_val, scale = 1;
 		  int rtype;
 		    /* This is as easy as removing the multiple that was
 		     * added to scale the value to the simulation time,

tgt-vlog95/stmt.c

@@ -111,10 +111,10 @@ static void emit_stmt_lval_piece(ivl_scope_t scope, ivl_lval_t lval)
 
 static unsigned emit_stmt_lval(ivl_scope_t scope, ivl_statement_t stmt)
 {
-      unsigned idx;
       unsigned count = ivl_stmt_lvals(stmt);
       unsigned wid = 0;
       if (count > 1) {
+	    unsigned idx;
 	    ivl_lval_t lval = ivl_stmt_lval(stmt, 0);
 	    wid += ivl_lval_width(lval);
 	    fprintf(vlog_out, "{");
@@ -399,9 +399,10 @@ static void emit_stmt_repeat(ivl_scope_t scope, ivl_statement_t stmt)
 
 static void emit_stmt_stask(ivl_scope_t scope, ivl_statement_t stmt)
 {
-      unsigned idx, count = ivl_stmt_parm_count(stmt);
+      unsigned count = ivl_stmt_parm_count(stmt);
       fprintf(vlog_out, "%*c%s", get_indent(), ' ', ivl_stmt_name(stmt));
       if (count != 0) {
+	    unsigned idx;
 	    fprintf(vlog_out, "(");
 	    count -= 1;
 	    for (idx = 0; idx < count; idx += 1) {