Fix ios/objective-c types and errors/red boxes.

ios/Utils/RNSVGPathParser.m

@@ -43,7 +43,7 @@
     CGMutablePathRef path = CGPathCreateMutable();
     NSArray<NSTextCheckingResult *>* results = [_pathRegularExpression matchesInString:_d options:0 range:NSMakeRange(0, [_d length])];
     _bezierCurves = [[NSMutableArray alloc] init];
-    int count = [results count];
+    unsigned long count = [results count];
 
     if (count) {
         NSUInteger i = 0;

ios/Utils/RNSVGPercentageConverter.m

@@ -19,7 +19,9 @@ static NSRegularExpression* percentageRegExp;
 
 + (CGFloat)stringToFloat:(NSString *)string relative:(CGFloat)relative offset:(CGFloat)offset
 {
-    if (![self isPercentage:string]) {
+    if (string == nil) {
+        return offset;
+    } else if (![self isPercentage:string]) {
         return [string floatValue] + offset;
     } else {
         return [self percentageToFloat:string relative:relative offset:offset];