Fixing some warnings

src/graphics/engine/engine.cpp

@@ -3636,7 +3636,7 @@ void CEngine::RenderShadowMap()
     // If no shadow map texture exists, create it
     if (m_shadowMap.id == 0)
     {
-        int width, height;
+        int width = 256, height = 256;
 
         int depth = m_app->GetInstance().GetVideoConfig().depthSize;
 

src/object/brain.cpp

@@ -361,7 +361,8 @@ bool CBrain::EventProcess(const Event &event)
             }
             SetSelScript(m_selScript);
 
-            StartEditScript(newProgram, "");
+            char text[] = "";
+            StartEditScript(newProgram, text);
 
             std::string res;
             GetResource(RES_TEXT, RT_STUDIO_CLONED, res);

src/script/scriptfunc.cpp

@@ -3626,7 +3626,7 @@ bool CScriptFunctions::rfread (CBotVar* pThis, CBotVar* pVar, CBotVar* pResult,
     int     i;
     for ( i = 0 ; i < 2000 ; i++ ) chaine[i] = 0;
     
-    fgets(chaine, 1999, pFile);
+    (void) fgets(chaine, 1999, pFile);
     
     for ( i = 0 ; i < 2000 ; i++ ) if (chaine[i] == '\n') chaine[i] = 0;