Add Elseif and Fix For loop tabbing

Author: jwood13

snippets/c.json

@@ -2,19 +2,19 @@
 	"for": {
 		"prefix": "for",
 		"body": [
-			"for (${size_t} ${i} = ${1:0}; ${i} < ${length}; ${i}++)",
+			"for (${size_t} ${i} = ${1:0}; ${i} < ${2:length}; ${i}++)",
 			"{",
-			"	$2",
+			"	$3",
 			"}"
 		],
 		"description": "Code snippet for 'for' loop"
 	},
 	"forr": {
 		"prefix": "forr",
 		"body": [
-			"for (int ${i} = ${length} - 1; ${i} >= 0; ${i}--)",
+			"for (int ${i} = ${1:length} - 1; ${i} >= ${2:0}; ${i}--)",
 			"{",
-			"	$1",
+			"	$3",
 			"}"
 		],
 		"description": "Code snippet for reverse 'for' loop"
@@ -49,6 +49,16 @@
 		],
 		"description": "Code snippet for else statement"
 	},
+	"elseif": {
+		"prefix": "elseif",
+		"body": [
+			"elseif ($1)",
+			"{",
+			"	$2",
+			"}"
+		],
+		"description": "Code snippet for else-if statement"
+	},
 	"enum": {
 		"prefix": "enum",
 		"body": [