From Sekender, fixed warnins

src/osgPlugins/bsp/ReaderWriterVTF.cpp

@@ -357,7 +357,6 @@ osg::Image* ReadVTFFile(std::istream& _istream)
     int               s, t, r;
     unsigned int      lrSize;
     unsigned char *   imageData;
-    unsigned char *   imageDataPtr;
     unsigned int      base;
     unsigned int      size;
     int               mip;

src/osgPlugins/bsp/VBSPReader.cpp

@@ -440,7 +440,6 @@ std::string VBSPReader::findFileIgnoreCase(std::string filePath)
 
 ref_ptr<Texture> VBSPReader::readTextureFile(std::string textureName)
 {
-    int           i;
     std::string   texFile;
     std::string   texPath;
     Image *       texImage;
@@ -811,7 +810,7 @@ void VBSPReader::createScene()
     char *               mtlPtr = 0;
     char *               tmpPtr = 0;
     char                 tempTex[256];
-    int                  i, j;
+    int                  i;
     ref_ptr<StateSet>    stateSet;
 
     // Create the root group for the scene

src/osgPlugins/curl/ReaderWriterCURL.cpp

@@ -403,7 +403,7 @@ bool ReaderWriterCURL::read(std::istream& fin, std::string& destination) const
                        15 + 32 // autodected zlib or gzip header
                        );
     if (ret != Z_OK)
-        return ret;
+        return false;
 
     /* decompress until deflate stream ends or end of file */
     do {