Refactor text boxes to not use the 'active' system

This removes the variables graphics.ntextbox, as well as removing
'active' from each text box object. Thus, all text boxes are really
real, and you don't have to check its 'active' variable.

desktop_version/src/Graphics.cpp

@@ -85,10 +85,6 @@ void Graphics::init()
     menuoffset = 0;
     resumegamemode = false;
 
-    //Textboxes!
-    textbox.resize(30);
-    ntextbox = 0;
-
     //Fading stuff
     fadebars.resize(15);
 
@@ -580,15 +576,17 @@ void Graphics::drawgui()
 {
     textboxcleanup();
     //Draw all the textboxes to the screen
-    for (int i = 0; i<ntextbox; i++)
+    for (size_t i = 0; i<textbox.size(); i++)
     {
         //This routine also updates the textboxs
         textbox[i].update();
-        if (textbox[i].active)
+        if (true) //FIXME: remove this later (no more 'active')
         {
             if (textbox[i].tm == 2 && textbox[i].tl <= 0.5)
             {
-                textbox[i].active = false;
+                textbox.erase(textbox.begin() + i);
+                i--;
+                continue;
             }
 
             if (textbox[i].r == 0 && textbox[i].g == 0 && textbox[i].b == 0)
@@ -966,7 +964,7 @@ void Graphics::drawtextbox( int x, int y, int w, int h, int r, int g, int b )
 void Graphics::textboxactive()
 {
     //Remove all but the most recent textbox
-    for (int i = 0; i < ntextbox; i++)
+    for (int i = 0; i < (int) textbox.size(); i++)
     {
         if (m != i) textbox[i].remove();
     }
@@ -975,7 +973,7 @@ void Graphics::textboxactive()
 void Graphics::textboxremovefast()
 {
     //Remove all textboxes
-    for (int i = 0; i < ntextbox; i++)
+    for (size_t i = 0; i < textbox.size(); i++)
     {
         textbox[i].removefast();
     }
@@ -984,7 +982,7 @@ void Graphics::textboxremovefast()
 void Graphics::textboxremove()
 {
     //Remove all textboxes
-    for (int i = 0; i < ntextbox; i++)
+    for (size_t i = 0; i < textbox.size(); i++)
     {
         textbox[i].remove();
     }
@@ -1008,36 +1006,20 @@ void Graphics::textboxadjust()
 
 void Graphics::createtextbox( std::string t, int xp, int yp, int r/*= 255*/, int g/*= 255*/, int b /*= 255*/ )
 {
-
-    if(ntextbox == 0)
-    {
-        //If there are no active textboxes, Z=0;
-        m = 0;
-        ntextbox++;
-    }
-    else
-    {
-        /*i = 0; m = -1;
-        while (i < ntextbox) {
-        if (!textbox[i].active) {	m = i; i = ntextbox;}
-        i++;
-        }
-        if (m == -1) {m = ntextbox; ntextbox++;}
-        */
-        m = ntextbox;
-        ntextbox++;
-    }
+    m = textbox.size();
 
     if(m<20)
     {
-        textbox[m].clear();
-        textbox[m].line[0] = t;
-        textbox[m].xp = xp;
+        textboxclass text;
+        text.clear();
+        text.line[0] = t;
+        text.xp = xp;
         int length = utf8::unchecked::distance(t.begin(), t.end());
-        if (xp == -1) textbox[m].xp = 160 - (((length / 2) + 1) * 8);
-        textbox[m].yp = yp;
-        textbox[m].initcol(r, g, b);
-        textbox[m].resize();
+        if (xp == -1) text.xp = 160 - (((length / 2) + 1) * 8);
+        text.yp = yp;
+        text.initcol(r, g, b);
+        text.resize();
+        textbox.push_back(text);
     }
 }
 
@@ -2891,12 +2873,6 @@ void Graphics::setwarprect( int a, int b, int c, int d )
 
 	void Graphics::textboxcleanup()
 	{
-		int i = ntextbox - 1;
-		while (i >= 0 && !textbox[i].active)
-		{
-			ntextbox--;
-			i--;
-		}
 	}
 
 void Graphics::textboxcenter()