Fixed warnings from Xcode Analyzer

SSZipArchive/SSZipArchive.m

@@ -233,6 +233,10 @@
                             // Unable to set the permissions attribute
                             NSLog(@"[SSZipArchive] Failed to set attributes - whilst setting permissions");
                         }
+                        
+#if !__has_feature(objc_arc)
+                        [attrs release];
+#endif
                     }
 	            }
 	        }

SSZipArchive/minizip/unzip.c

@@ -1514,6 +1514,7 @@ extern int ZEXPORT unzOpenCurrentFile3 (unzFile file, int* method,
     pfile_in_zip_read_info->size_local_extrafield = size_local_extrafield;
     pfile_in_zip_read_info->pos_local_extrafield=0;
     pfile_in_zip_read_info->raw=raw;
+    pfile_in_zip_read_info->byte_before_the_zipfile = 0;
 
     if (pfile_in_zip_read_info->read_buffer==NULL)
     {