Fix a few minor warnings

dgl/src/Window.cpp

@@ -1201,6 +1201,9 @@ bool Window::openFileBrowser(const FileBrowserOptions& options)
 # else
     // not implemented
     return false;
+
+    // unused
+    (void)options;
 # endif
 }
 #endif

dgl/src/nanovg/fontstash.h

@@ -1226,7 +1226,7 @@ float fonsDrawText(FONScontext* stash,
 				   const char* str, const char* end)
 {
 	FONSstate* state = fons__getState(stash);
-	unsigned int codepoint;
+	unsigned int codepoint = 0;
 	unsigned int utf8state = 0;
 	FONSglyph* glyph = NULL;
 	FONSquad q;
@@ -1411,7 +1411,7 @@ float fonsTextBounds(FONScontext* stash,
 					 float* bounds)
 {
 	FONSstate* state = fons__getState(stash);
-	unsigned int codepoint;
+	unsigned int codepoint = 0;
 	unsigned int utf8state = 0;
 	FONSquad q;
 	FONSglyph* glyph = NULL;

dgl/src/pugl/pugl_win.cpp

@@ -418,7 +418,7 @@ handleMessage(PuglView* view, UINT message, WPARAM wParam, LPARAM lParam)
 }
 
 void
-puglGrabFocus(PuglView* view)
+puglGrabFocus(PuglView* /*view*/)
 {
 	// TODO
 }
@@ -474,7 +474,7 @@ puglGetNativeWindow(PuglView* view)
 }
 
 void*
-puglGetContext(PuglView* view)
+puglGetContext(PuglView* /*view*/)
 {
 #ifdef PUGL_HAVE_CAIRO
 	if (view->ctx_type == PUGL_CAIRO) {

dgl/src/sofd/libsofd.c

@@ -1665,7 +1665,7 @@ static void add_place_raw (Display *dpy, const char *name, const char *path) {
 	strcpy (_placelist[_placecnt].name, name);
 	_placelist[_placecnt].flags = 0;
 
-	int sw;
+	int sw = -1;
 	query_font_geometry (dpy, _fib_gc, name, &sw, NULL, NULL, NULL);
 	if (sw > _fib_place_width) {
 		_fib_place_width = sw;