Avoid compiler warning about signedness mismatch

This warning kept appearing for me:

Script.cpp:350:35: warning: comparison of integer expressions of
different signedness: ‘int’ and
‘std::__cxx11::basic_string<char>::size_type’
{aka ‘long unsigned int’} [-Wsign-compare]

  350 |                 for (int i = 0; i < words[1].size(); i++)
      |                                 ~~^~~~~~~~~~~~~~~~~

So I just made it a size_t instead.

desktop_version/src/Music.cpp

@@ -381,6 +381,12 @@ public:
     MusicTrack(SDL_RWops *rw, const char* _id, bool _loose_extra)
     {
         SDL_zerop(this);
+        if (rw->size(rw) <= 1)
+        {
+            // Don't bother
+            vlog_debug("Skipping empty music track");
+            goto end;
+        }
         read_buf = (Uint8*) SDL_malloc(rw->size(rw));
         SDL_RWread(rw, read_buf, rw->size(rw), 1);
         int err;

desktop_version/src/Script.cpp

@@ -347,7 +347,7 @@ void scriptclass::run(void)
                 int current = 0;
 
                 // Crawl through the string
-                for (int i = 0; i < words[1].size(); i++)
+                for (size_t i = 0; i < words[1].size(); i++)
                 {
                     // If the current character is a number, add it to the current version part
                     if (words[1][i] >= '0' && words[1][i] <= '9')