eeptools: Add casts to avoid compiler complaints

debian package results in:

/<<PKGBUILDDIR>>/eeptools/eeplib.c: In function ‘eepio_end’:
/<<PKGBUILDDIR>>/eeptools/eeplib.c:237:25: error: comparison of integer expressions of different signedness: ‘long int’ and ‘uint32_t’ {aka ‘unsigned int’} [-Werror=sign-compare]
  237 |                 if (pos != eep_header.eeplen)
      |                         ^~
/<<PKGBUILDDIR>>/eeptools/eeplib.c:239:29: error: comparison of integer expressions of different signedness: ‘long int’ and ‘uint32_t’ {aka ‘unsigned int’} [-Werror=sign-compare]
  239 |                 if (pos_end != eep_header.eeplen)
      |                             ^~
/<<PKGBUILDDIR>>/eeptools/eeplib.c:241:29: error: comparison of integer expressions of different signedness: ‘long int’ and ‘uint32_t’ {aka ‘unsigned int’} [-Werror=sign-compare]
  241 |                 if (pos_end != eep_header.eeplen)
      |                             ^~
/<<PKGBUILDDIR>>/eeptools/eeplib.c: In function ‘eepio_atom_end’:
/<<PKGBUILDDIR>>/eeptools/eeplib.c:287:49: error: comparison of integer expressions of different signedness: ‘long int’ and ‘uint32_t’ {aka ‘unsigned int’} [-Werror=sign-compare]
  287 |                 if (pos - eepio_atom_data_start != eep_atom_header.dlen)
      |                                                 ^~
cc1: all warnings being treated as errors
make[3]: *** [eeptools/CMakeFiles/eepmake.dir/build.make:93: eeptools/CMakeFiles/eepmake.dir/eeplib.c.o] Error 1

You can see these warnings with "gcc -O2 -Wall"

Author: popcornmix

eeptools/eeplib.c

@@ -234,11 +234,11 @@ bool eepio_end(void)
 			return eepio_error("ftell failed");
 		if (pos != pos_end)
 			eepio_warning("Dump finished before EOF");
-		if (pos != eep_header.eeplen)
+		if (pos != (long)eep_header.eeplen)
 			eepio_warning("Dump finished before length specified in header");
-		if (pos_end != eep_header.eeplen)
+		if (pos_end != (long)eep_header.eeplen)
 			eepio_warning("EOF does not match length specified in header");
-		if (pos_end != eep_header.eeplen)
+		if (pos_end != (long)eep_header.eeplen)
 			eepio_warning("%i bytes of file not processed");
 	}
 	return !eepio_got_error();
@@ -284,7 +284,7 @@ void eepio_atom_end(void)
 	if (eepio_dir == EEPIO_READ)
 	{
 		long pos = ftell(eepio_fp);
-		if (pos - eepio_atom_data_start != eep_atom_header.dlen)
+		if (pos - eepio_atom_data_start != (long)eep_atom_header.dlen)
 			eepio_warning("atom data length mismatch");
 		if (crc_actual != eep_atom_crc)
 			eepio_warning("atom CRC16 mismatch. Calculated CRC16=0x%02x", crc_actual);