fix uninitialized variables, this should fix -O3 compile

src/sdl_utils.cpp

@@ -546,6 +546,8 @@ surface recolor_image(surface surf, const color_range& new_rgb, const std::vecto
 		new_g=(Uint8)( old_rat * new_green + (1 - old_rat) * max_green);
 		new_b=(Uint8)( old_rat * new_blue  + (1 - old_rat) * max_blue);
 	      }else{
+		      new_r=0; new_g=0; new_b=0; //supress warning
+		      wassert(false);
 		//should never get here
 		//would imply old_avg > reference_avg = 255
 	      }

src/unit.cpp

@@ -1550,6 +1550,7 @@ void unit::refresh_unit(display& disp,gamemap::location hex,bool with_status)
 
 	Uint32 blend_with = current_frame.blend_with;
 	double blend_ratio = current_frame.blend_ratio;
+	if(blend_ratio == 0) { blend_with = disp.rgb(0,0,0); }
 	fixed_t highlight_ratio = minimum<fixed_t>(alpha(),current_frame.highlight_ratio);
 	if(invisible(map.underlying_union_terrain(map[hex.x][hex.y]),
 				disp.get_game_status().get_time_of_day().lawful_bonus,hex,

src/unit_animation.cpp

@@ -39,6 +39,8 @@ unit_frame::unit_frame(const config& cfg)
 	end_time = atoi(cfg["end"].c_str());
 	highlight_ratio = ftofxp(1);
 	halo = prepare_halo(cfg["halo"],begin_time,end_time);
+	blend_with= 0;
+	blend_ratio = 0;
 	
 }
 

src/unit_animation.hpp

@@ -24,7 +24,10 @@
 
 //a class to describe a unit's animation sequence
 struct unit_frame {
-		unit_frame() : xoffset(0), halo_x(0), halo_y(0), begin_time(0), end_time(0),highlight_ratio(ftofxp(1)){}
+		unit_frame() : xoffset(0), image(), image_diagonal(),halo(), sound(),
+			       halo_x(0), halo_y(0), begin_time(0), end_time(0),
+			       blend_with(0),blend_ratio(0),
+			       highlight_ratio(ftofxp(1)){}
 		explicit unit_frame(const std::string& str, const std::string & diag ="",
 				int begin=0,int end = 0,
 				Uint32 blend_color = 0, double blend_rate = 0.0, 

src/unit_display.cpp

@@ -254,6 +254,7 @@ bool unit_attack_ranged(display& disp,const gamemap& map, unit_map& units,
 				missile_animation.get_first_frame_time()),-200);
 	missile_animation.start_animation(start_time,acceleration);
 	defender.restart_animation(disp,start_time);
+	animation_time = defender.get_animation()->get_animation_time();
 	while(!defender.get_animation()->animation_finished()  ||
 			(leader_loc.valid() && !leader->second.get_animation()->animation_finished())) {
 		const double pos = animation_time < missile_animation.get_first_frame_time()?1.0: