Fix attempted to read or write protected memory (#2)

Author: TheSnowfield

src/encoder.c

@@ -104,7 +104,7 @@ int sampleRate, cb_codec callback, void* userdata)
 
     /* Read input */
     counter = (frameSizeReadFromFile_ms * API_fs_Hz) / 1000;
-    if (counter > psReadEnd - psRead) {
+    if (counter * sizeof(SKP_int16) > psReadEnd - psRead) {
       memset(in, 0x00, sizeof(in));
 
       size_t realrd = (psReadEnd - psRead);