Refactor to avoid OCLint warnings.

[onato]

No description provided.

[onato]

These were the warnings.

AGWindowView.m:243:8: bitwise operator in conditional P2 
AGWindowView.m:249:12: bitwise operator in conditional P2 
AGWindowView.m:253:17: bitwise operator in conditional P2 
AGWindowView.m:257:17: bitwise operator in conditional P2 
AGWindowView.m:107:5: empty if statement P2 
AGWindowView.m:116:1: long line P3 Line with 187 characters exceeds limit of 150
AGWindowView.m:118:1: long line P3 Line with 181 characters exceeds limit of 150
AGWindowView.m:225:1: long line P3 Line with 156 characters exceeds limit of 150
AGWindowView.m:299:1: long line P3 Line with 192 characters exceeds limit of 150
AGWindowView.m:322:1: long line P3 Line with 178 characters exceeds limit of 150
AGWindowView.m:114:5: ivar assignment outside accessors or init P2 
AGWindowView.m:455:10: redundant if statement P3 
AGWindowView.m:200:5: unnecessary else statement P3 
AGWindowView.m:248:5: unnecessary else statement P3 
AGWindowView.m:262:9: unnecessary else statement P3 
AGWindowView.m:460:5: unnecessary else statement P3 
AGWindowView.m:195:8: useless parentheses P3