Correct some spelling mistakes

Automaticaly --> Automatically
Invalide --> Invalid
Strech --> Stretch
allows to --> allows one to
attachement --> attachment
contraints --> constraints
inconsistant --> inconsistent
occured --> occurred
occurences --> occurrences
permits to --> permits one to
postion --> position
regularily --> regularly
transfered --> transferred

src/SFont.c

@@ -159,7 +159,7 @@ int SFont_TextWidth(const SFont_Font *Font, const char *text)
 
 int SFont_TextHeight(const SFont_Font* Font, const char *text)
 {
-    // Count occurences of '\n'
+    // Count occurrences of '\n'
     int nb_cr=0;
     while (*text!='\0')
     {