Remove NULLs except in comments as some compilers/OS's give strange definitions.

demos/modules/gwin/imagebox/main.c

@@ -41,7 +41,7 @@ static void createWidgets(void) {
  
 	// create the first image widget
 	wi.g.x = 10; wi.g.y = 10; wi.g.width = 200; wi.g.height = 100;
-	ghImage1 = gwinImageCreate(NULL, &wi.g);
+	ghImage1 = gwinImageCreate(0, &wi.g);
 	gwinImageOpenFile(ghImage1, "ugfx_logo_banner.bmp");
  }
  

demos/modules/gwin/label/main.c

@@ -44,13 +44,13 @@ static void createWidgets(void) {
 	// Create the IP label
 	wi.g.width = 200; wi.g.height = 20; wi.g.x = 10, wi.g.y = 80;
 	wi.text = "192.168.1.42";
-	ghLabel1 = gwinLabelCreate(NULL, &wi);
+	ghLabel1 = gwinLabelCreate(0, &wi);
 	gwinLabelSetAttribute(ghLabel1, 100, "Current IP:");
 
 	// Create the DHCP label
 	wi.g.width = 200; wi.g.height = 20; wi.g.x = 10, wi.g.y = 100;
 	wi.text = "Off";
-	ghLabel2 = gwinLabelCreate(NULL, &wi);
+	ghLabel2 = gwinLabelCreate(0, &wi);
 	gwinLabelSetAttribute(ghLabel2, 100, "DHCP:");
 }
 

demos/modules/gwin/list/main.c

@@ -43,12 +43,12 @@ static void createWidgets(void) {
 	// Create the label for the first list
 	wi.g.width = 150; wi.g.height = 20; wi.g.x = 10, wi.g.y = 80;
 	wi.text = "List 1: Default";
-	ghLabel1 = gwinLabelCreate(NULL, &wi);
+	ghLabel1 = gwinLabelCreate(0, &wi);
 
 	// Create the label for the second list
 	wi.g.width = 150; wi.g.height = 20; wi.g.x = 165, wi.g.y = 80;
 	wi.text = "List 2: Smooth scrolling";
-	ghLabel1 = gwinLabelCreate(NULL, &wi);
+	ghLabel1 = gwinLabelCreate(0, &wi);
 
 	// The first list widget
 	wi.g.width = 150;

demos/modules/gwin/progressbar/main.c

@@ -9,7 +9,7 @@ static void _createWidget(void) {
 	wi.g.show = TRUE;
  
 	wi.g.y = 10; wi.g.x = 10; wi.g.width = 200; wi.g.height = 20; wi.text = "Progress 1";
-	ghProgressbar = gwinProgressbarCreate(NULL, &wi);
+	ghProgressbar = gwinProgressbarCreate(0, &wi);
 }
 
 int main(void) {

tools/file2c/src/file2c.c

@@ -168,7 +168,7 @@ size_t		i;
 		if (opt_inputfile)
 			opt_arrayname = basenameof(strcpy(tname, opt_inputfile));
 		if (!opt_arrayname || !opt_arrayname[0]) {
-			srand(time(NULL));
+			srand(time(0));
 			sprintf(tname, "filearray%u", rand());
 			opt_arrayname = tname;
 		}