make header_type char const*

Author: Roman Gruber

src/lib/io/gauge_read.c

@@ -28,7 +28,7 @@ paramsGaugeInfo GaugeInfo = {0., 0, {0, 0}, NULL, NULL};
 
 int read_gauge_field(char *filename, su3 **const gf) {
   int status = 0;
-  char *header_type = NULL;
+  char const* header_type = NULL;
   READER *reader = NULL;
 
   paramsIldgFormat ildgformat_read;

src/lib/io/spinor_read.c

@@ -41,7 +41,7 @@ paramsSourceInfo SourceInfo = {0,
 int read_spinor(spinor* const s, spinor* const r, char* filename, const int position_) {
   int status = 0, getpos = 0, prec = 0, prop_type, position = position_, rstat = 0;
   uint64_t bytes = 0;
-  char* header_type = NULL;
+  char const* header_type = NULL;
   READER* reader = NULL;
   DML_Checksum checksum_read;
   DML_Checksum checksum;

src/lib/io/utils_parse_propagator_type.c

@@ -21,7 +21,7 @@
 
 int parse_propagator_type(READER *reader) {
   char *prop_type_string = NULL;
-  char *header_type = NULL;
+  char const* header_type = NULL;
   int prop_type = -1;
   int status = 0;
   int proptypefound = 0, sourcetypefound = 0;