Fix NPE

mirai-core-qqandroid/build.gradle.kts

@@ -30,8 +30,9 @@ fun ktor(id: String, version: String) = "io.ktor:ktor-$id:$version"
 description = "QQ protocol library"
 version = rootProject.ext.get("mirai_version")!!.toString()
 
+val isAndroidSDKAvailable: Boolean by project
+
 kotlin {
-    val isAndroidSDKAvailable: Boolean by project
     if (isAndroidSDKAvailable) {
         android("android") {
             publishAllLibraryVariants()
@@ -96,6 +97,7 @@ kotlin {
             }
         }
 
+        if (isAndroidSDKAvailable) {
             val androidMain by getting {
                 dependencies {
                 }
@@ -109,6 +111,7 @@ kotlin {
                     api(kotlin("test-common"))
                 }
             }
+        }
 
         val jvmMain by getting {
             dependencies {

mirai-core-timpc/build.gradle.kts

@@ -30,8 +30,9 @@ fun ktor(id: String, version: String) = "io.ktor:ktor-$id:$version"
 description = "QQ protocol library"
 version = rootProject.ext.get("mirai_version")!!.toString()
 
+val isAndroidSDKAvailable: Boolean by project
+
 kotlin {
-    val isAndroidSDKAvailable: Boolean by project
     if (isAndroidSDKAvailable) {
         android("android") {
             publishAllLibraryVariants()
@@ -95,6 +96,7 @@ kotlin {
             }
         }
 
+        if (isAndroidSDKAvailable) {
             val androidMain by getting {
                 dependencies {
                 }
@@ -108,6 +110,7 @@ kotlin {
                     api(kotlin("test-common"))
                 }
             }
+        }
 
         val jvmMain by getting {
             dependencies {

mirai-core/build.gradle.kts

@@ -29,8 +29,9 @@ fun ktor(id: String, version: String) = "io.ktor:ktor-$id:$version"
 
 description = "QQ protocol library"
 
+val isAndroidSDKAvailable: Boolean by project
+
 kotlin {
-    val isAndroidSDKAvailable: Boolean by project
     if (isAndroidSDKAvailable) {
         android("android") {
             publishAllLibraryVariants()
@@ -108,6 +109,7 @@ kotlin {
             }
         }
 
+        if (isAndroidSDKAvailable) {
             val androidMain by getting {
                 dependencies {
                     api(kotlin("reflect", kotlinVersion))
@@ -127,6 +129,7 @@ kotlin {
                     api(kotlin("test-common"))
                 }
             }
+        }
 
         val jvmMain by getting {
             dependencies {