Use ffStrbufEndsWithC instead of custom impl

src/common/init.c

@@ -80,7 +80,7 @@ static void initCacheDir(FFstate* state)
         ffStrbufAppendS(&state->cacheDir, state->passwd->pw_dir);
         ffStrbufAppendS(&state->cacheDir, "/.cache/");
     }
-    else if(state->cacheDir.chars[state->cacheDir.length - 1] != '/')
+    else if(!ffStrbufEndsWithC(&state->cacheDir, '/'))
         ffStrbufAppendC(&state->cacheDir, '/');
 
     mkdir(state->cacheDir.chars, S_IRWXU | S_IXGRP | S_IRGRP | S_IXOTH | S_IROTH); //I hope everybody has a cache folder, but who knows

src/util/FFstrbuf.c

@@ -363,7 +363,7 @@ void ffStrbufTrimLeft(FFstrbuf* strbuf, char c)
 
 void ffStrbufTrimRight(FFstrbuf* strbuf, char c)
 {
-    while(strbuf->length > 0 && strbuf->chars[strbuf->length - 1] == c)
+    while(ffStrbufEndsWithC(strbuf, c))
         --strbuf->length;
     strbuf->chars[strbuf->length] = '\0';
 }