Fix uninitialized vars

Initialized variables that are conditionally set. In particular, this
construct is dangerous:
  void *p;
  if (something) p = couldReturnNull();
  if (!p) p = fallbackFunction();

util/getstyle.c

@@ -181,7 +181,7 @@ static Bool isFontOption(char *option)
 /* XXX: is almost like WINGs/wcolodpanel.c:fetchFile() */
 void copyFile(char *dir, char *file)
 {
-	FILE *src, *dst;
+	FILE *src = NULL, *dst = NULL;
 	size_t nread, nwritten, len;
 	char buf[4096];
 	struct stat st;
@@ -230,7 +230,9 @@ void copyFile(char *dir, char *file)
 	RETRY( fclose(dst) )
 
 err:
-	RETRY( fclose(src) )
+	if (src) {
+		RETRY( fclose(src) )
+	}
 	wfree(dstpath);
 	return;
 }

util/wmsetbg.c

@@ -471,7 +471,7 @@ BackgroundTexture *parseTexture(RContext * rc, char *text)
 		XColor color;
 		Pixmap pixmap = None;
 		RImage *image = NULL;
-		int iwidth, iheight;
+		int iwidth = 0, iheight = 0;
 		RColor rcolor;
 
 		GETSTRORGOTO(val, tmp, 1, error);
@@ -879,7 +879,7 @@ void helperLoop(RContext * rc)
 	memset(textures, 0, WORKSPACE_COUNT * sizeof(BackgroundTexture *));
 
 	while (1) {
-		int workspace;
+		int workspace = -1;
 
 		/* get length of message */
 		if (readmsg(0, buffer, 4) < 0) {