- restored default one 'solid' light

- subsurd level '0' is possible again.
  however; it was changed to '1' because convert-to-mesh crashes. the
  subsurf code doesnt give a result when level is '0', causing the convert
  routines to either crash, or deliver empty mesh...
  I added a warning in the convert routine now, and dont do anything then.
- changed all glFlush() in glFinish() in editobject.c, which seems to be
  the right magical call to show frontbuffer drawing.

source/blender/src/buttons_editing.c

@@ -380,8 +380,8 @@ static void editing_panel_mesh_type(Object *ob, Mesh *me)
 	uiDefButS(block, TOG|BIT|7, B_MAKEDISP, "SubSurf",		10,124,130,17, &me->flag, 0, 0, 0, 0, "Treats the active object as a Catmull-Clark Subdivision Surface");
 	uiBlockSetCol(block, TH_AUTO);
 
-	uiDefButS(block, NUM, B_MAKEDISP, "Subdiv:",			10,104,100,18, &me->subdiv, 1, 6, 0, 0, "Defines the level of subdivision to display in real time interactively");
-	uiDefButS(block, NUM, B_MAKEDISP, "",					110, 104, 30, 18, &me->subdivr, 1, 6, 0, 0, "Defines the level of subdivision to apply during rendering");
+	uiDefButS(block, NUM, B_MAKEDISP, "Subdiv:",			10,104,100,18, &me->subdiv, 0, 6, 0, 0, "Defines the level of subdivision to display in real time interactively");
+	uiDefButS(block, NUM, B_MAKEDISP, "",					110, 104, 30, 18, &me->subdivr, 0, 6, 0, 0, "Defines the level of subdivision to apply during rendering");
 	uiDefButS(block, TOG|BIT|8, B_MAKEDISP, "Optimal",	10,84,130,17, &me->flag, 0, 0, 0, 0, "Only draws optimal wireframe");
 	
 	if(me->msticky) val= 1.0; else val= 0.0;

source/blender/src/drawview.c

@@ -168,7 +168,7 @@ void default_gl_light(void)
 		U.light[0].spec[0]= 0.5; U.light[0].spec[1]= 0.5; U.light[0].spec[2]= 0.5;
 		U.light[0].spec[3]= 1.0;
 		
-		U.light[1].flag= 1;
+		U.light[1].flag= 0;
 		U.light[1].vec[0]= 0.5; U.light[1].vec[1]= 0.5; U.light[1].vec[2]= 0.1;
 		U.light[1].col[0]= 0.4; U.light[1].col[1]= 0.4; U.light[1].col[2]= 0.8;
 		U.light[1].spec[0]= 0.3; U.light[1].spec[1]= 0.3; U.light[1].spec[2]= 0.5;

source/blender/src/editmesh.c

@@ -2053,7 +2053,7 @@ static void tekenvertices_special(int mode, EditVert *act) /* teken = draw */
 	
 	myloadmatrix(G.vd->viewmat);
 
-	glFlush();
+	glFinish();
 	glDrawBuffer(GL_BACK);
 	
 }
@@ -7238,7 +7238,7 @@ CutCurve *get_mouse_trail(int *len, char mode){
 		
 		if (rubberband)  { /* rubberband mode, undraw last rubberband */
 			sdrawXORline(curve[i-1].x, curve[i-1].y,mval[0], mval[1]); 
-			glFlush();
+			glFinish();
 			rubberband=0;
 		}
 		
@@ -7261,7 +7261,7 @@ CutCurve *get_mouse_trail(int *len, char mode){
 			if (restart) { 
 				for(j=1;j<i;j++) sdrawXORline(curve[j-1].x, curve[j-1].y, curve[j].x, curve[j].y);
 				if (rubberband) sdrawXORline(curve[j].x, curve[j].y, mval[0], mval[1]);
-				glFlush();
+				glFinish();
 				rubberband=0;
 				lasti=i=0;
 				restart=0;
@@ -7283,12 +7283,12 @@ CutCurve *get_mouse_trail(int *len, char mode){
 		
 		if ((i>1)&&(i!=lasti)) {  /*Draw recorded part of curve */
 			sdrawXORline(curve[i-2].x, curve[i-2].y, curve[i-1].x, curve[i-1].y);
-			glFlush();
+			glFinish();
 		}
 		
 		if ((i==lasti)&&(i>0)) { /*Draw rubberband */
 			sdrawXORline(curve[i-1].x, curve[i-1].y,mval[0], mval[1]);
-			glFlush();
+			glFinish();
 			rubberband=1;
 		}
 		lasti=i;
@@ -7309,7 +7309,7 @@ CutCurve *get_mouse_trail(int *len, char mode){
 		sdrawXORline(curve[j-1].x, curve[j-1].y, curve[j].x, curve[j].y );
 	}
 
-	glFlush();
+	glFinish();
 	persp(PERSP_VIEW);
 
 	*len=i;

source/blender/src/editobject.c

@@ -1689,7 +1689,10 @@ void convertmenu(void)
 			else if(ob->type==OB_MESH) {
 				Mesh *oldme= ob->data;
 				
-				if (oldme->flag&ME_SUBSURF) {
+				if( oldme->subdiv==0 ) {
+					error("No subdivision Mesh to convert available");
+				}
+				else if (oldme->flag&ME_SUBSURF) {
 					ob->flag |= OB_DONE;
 
 					ob1= copy_object(ob);