Fixed little glitch that could cause explosions to be cut before they had time to fade out

git-svn-id: svn+ssh://svn.code.sf.net/p/supertuxkart/code/main/trunk@6888 178a84e3-b1eb-0310-8ba1-8eac791a3b58

src/graphics/explosion.cpp

@@ -27,7 +27,6 @@
 #include "items/projectile_manager.hpp"
 #include "utils/vec3.hpp"
 
-const float explosion_time = 1.5f;
 const float burst_time = 0.1f;
 
 Explosion::Explosion(const Vec3& coord, const char* explosion_sound)

src/graphics/explosion.hpp

@@ -28,6 +28,8 @@ using namespace irr;
 class Vec3;
 class SFXBase;
 
+const float explosion_time = 1.5f;
+
 /**
   * \ingroup graphics
   */
@@ -44,7 +46,7 @@ public:
     void init     (const Vec3& coord);
     void update   (float delta_t);
     int  inUse    ();
-    bool hasEnded () { return  m_remaining_time<0.0f;  }
+    bool hasEnded () { return  m_remaining_time < -explosion_time;  }
 
 } ;