Prevent more warnings

deps/rcheevos/src/rcheevos/operand.c

@@ -29,7 +29,7 @@ static int rc_parse_operand_lua(rc_operand_t* self, const char** memaddr, rc_par
     return RC_INVALID_LUA_OPERAND;
   }
 
-  if (!isalpha(*aux)) {
+  if (!isalpha((unsigned char)*aux)) {
     return RC_INVALID_LUA_OPERAND;
   }
 
@@ -37,7 +37,7 @@ static int rc_parse_operand_lua(rc_operand_t* self, const char** memaddr, rc_par
   id = aux;
 #endif
 
-  while (isalnum(*aux) || *aux == '_') {
+  while (isalnum((unsigned char)*aux) || *aux == '_') {
     aux++;
   }
 

deps/rcheevos/src/rcheevos/richpresence.c

@@ -30,7 +30,7 @@ static const char* rc_parse_line(const char* line, const char** end) {
     if (endline > line && endline[-1] == '\r')
       --endline;
   } else {
-    while (endline > line && isspace(endline[-1]))
+    while (endline > line && isspace((unsigned char)endline[-1]))
       --endline;
   }
 
@@ -237,7 +237,7 @@ static const char* rc_parse_richpresence_lookup(rc_richpresence_lookup_t* lookup
       else
         key = strtoul(&number[0], &endptr, 10);
 
-      if (*endptr && !isspace(*endptr)) {
+      if (*endptr && !isspace((unsigned char)*endptr)) {
         parse->offset = RC_INVALID_CONST_OPERAND;
         return nextline;
       }

deps/rcheevos/src/rcheevos/value.c

@@ -116,7 +116,7 @@ void rc_parse_legacy_value(rc_value_t* self, const char** memaddr, rc_parse_stat
           }
           else {
             /* if it looks like a floating point number, add the 'f' prefix */
-            while (isdigit(*buffer_ptr))
+            while (isdigit((unsigned char)*buffer_ptr))
               ++buffer_ptr;
             if (*buffer_ptr == '.')
               *ptr++ = 'f';

deps/rcheevos/src/rhash/hash.c

@@ -882,13 +882,13 @@ static int rc_hash_psx(char hash[33], const char* path)
       if (strncmp(ptr, "BOOT", 4) == 0)
       {
         ptr += 4;
-        while (isspace(*ptr))
+        while (isspace((unsigned char)*ptr))
           ++ptr;
 
         if (*ptr == '=')
         {
           ++ptr;
-          while (isspace(*ptr))
+          while (isspace((unsigned char)*ptr))
             ++ptr;
 
           if (strncmp(ptr, "cdrom:", 6) == 0)
@@ -897,7 +897,7 @@ static int rc_hash_psx(char hash[33], const char* path)
             ++ptr;
 
           start = ptr;
-          while (!isspace(*ptr) && *ptr != ';')
+          while (!isspace((unsigned char)*ptr) && *ptr != ';')
             ++ptr;
 
           size = (unsigned)(ptr - start);
@@ -1237,7 +1237,7 @@ static const char* rc_hash_get_first_item_from_playlist(const char* path)
     next = ptr;
 
     /* remove trailing whitespace - especially '\r' */
-    while (ptr > start && isspace(ptr[-1]))
+    while (ptr > start && isspace((unsigned char)ptr[-1]))
       --ptr;
 
     /* if we found a non-empty line, break out of the loop to process it */