Graphics: try to fix some coverity reported issues.

src/graphics/gpuparticles.cpp

@@ -78,6 +78,23 @@ ParticleSystemProxy::ParticleSystemProxy(bool createDefaultEmitter,
 	glGenVertexArrays(1, &current_rendering_vao);
 	glGenVertexArrays(1, &non_current_rendering_vao);
 	size_increase_factor = 0.;
+
+    // We set these later but avoid coverity report them
+    heighmapbuffer = 0;
+    heightmaptexture = 0;
+    current_simulation_vao = 0;
+    non_currenthm__simulation_vao = 0;
+    current_hm_simulation_vao = 0;
+    current_rendering_flip_vao = 0;
+    non_current_rendering_flip_vao = 0;
+    has_height_map = false;
+    flip = false;
+    track_x = 0;
+    track_z = 0;
+    track_x_len = 0;
+    track_z_len = 0;
+    texture = 0;
+
 	if (quad_vertex_buffer)
 		return;
 	static const GLfloat quad_vertex[] = {

src/graphics/irr_driver.cpp

@@ -1520,7 +1520,9 @@ void IrrDriver::displayFPS()
     {
         sprintf(buffer, "FPS: %i/%i/%i - Objects (P1:%d P2:%d T:%d) KTris - LightDst : ~%d",
                 min, fps, max, object_count[SOLID_NORMAL_AND_DEPTH_PASS], object_count[SOLID_NORMAL_AND_DEPTH_PASS], object_count[TRANSPARENT_PASS], m_last_light_bucket_distance);
-		object_count[SOLID_NORMAL_AND_DEPTH_PASS] = object_count[SOLID_NORMAL_AND_DEPTH_PASS] = object_count[TRANSPARENT_PASS] = 0;
+		object_count[SOLID_NORMAL_AND_DEPTH_PASS] = 0;
+		object_count[SOLID_NORMAL_AND_DEPTH_PASS] = 0;
+		object_count[TRANSPARENT_PASS] = 0;
     }
     else
     {

src/graphics/light.hpp

@@ -66,8 +66,6 @@ public:
 protected:
     static core::aabbox3df box;
 
-    class ScreenQuad *sq;
-
     //float m_radius;
     float m_color[3];
     float m_energy;

src/graphics/post_processing.cpp

@@ -57,7 +57,11 @@ PostProcessing::PostProcessing(IVideoDriver* video_driver)
     io::IReadFile *areamap = irr_driver->getDevice()->getFileSystem()->
                          createMemoryReadFile((void *) AreaMap33, sizeof(AreaMap33),
                          "AreaMap33", false);
-    if (!areamap) Log::fatal("postprocessing", "Failed to load the areamap");
+	if (!areamap)
+	{
+		Log::fatal("postprocessing", "Failed to load the areamap");
+		return;
+	}
     m_areamap = irr_driver->getVideoDriver()->getTexture(areamap);
     areamap->drop();
 

src/graphics/rain.cpp

@@ -42,7 +42,7 @@ using namespace core;
 
 // The rain manager
 
-Rain::Rain(Camera *camera, irr::scene::ISceneNode* parent)
+Rain::Rain(Camera *camera, irr::scene::ISceneNode* parent) : m_thunder_sound(0)
 {
     m_lightning = camera->getIndex()==0;
 

src/graphics/stkanimatedmesh.cpp

@@ -106,9 +106,8 @@ void STKAnimatedMesh::render()
 	}
 	else
 	{
-#ifdef _DEBUG
-		os::Printer::log("Animated Mesh returned no mesh to render.", Mesh->getDebugName(), ELL_WARNING);
-#endif
+		Log::error("animated mesh", "Animated Mesh returned no mesh to render.");
+		return;
 	}
 
 	driver->setTransform(video::ETS_WORLD, AbsoluteTransformation);