Fixes a potential crash on iOS 8.3

Author: CooperRS

Podfile.lock

@@ -7,4 +7,4 @@ DEPENDENCIES:
 SPEC CHECKSUMS:
   RMActionController: cbaf3b20536c1c1be6547438b17472e488318888
 
-COCOAPODS: 0.37.1
+COCOAPODS: 0.37.2

RMPickerViewController/RMPickerViewController.m

@@ -54,7 +54,7 @@ + (instancetype)actionControllerWithStyle:(RMActionControllerStyle)style title:(
     controller.picker = [[UIPickerView alloc] initWithFrame:CGRectZero];
     controller.picker.translatesAutoresizingMaskIntoConstraints = NO;
 
-    controller.pickerHeightConstraint = [NSLayoutConstraint constraintWithItem:controller.picker attribute:NSLayoutAttributeHeight relatedBy:NSLayoutRelationEqual toItem:nil attribute:NSLayoutAttributeNotAnAttribute multiplier:0 constant:0];
+    controller.pickerHeightConstraint = [NSLayoutConstraint constraintWithItem:controller.picker attribute:NSLayoutAttributeHeight relatedBy:NSLayoutRelationEqual toItem:nil attribute:NSLayoutAttributeNotAnAttribute multiplier:1 constant:0];
 
     if(RM_CURRENT_ORIENTATION_IS_LANDSCAPE_PREDICATE) {
         controller.pickerHeightConstraint.constant = RM_PICKER_HEIGHT_LANDSCAPE;